VEGAS Pro 23 Bug: Timeline Events Lag After Ungrouping Video/Audio

Abdali wrote on 9/16/2025, 10:15 PM

Hello everyone,

I've discovered a serious bug that affects both video and audio events on the timeline, but only after they have been ungrouped from a video clip. This issue has a significant impact on workflow.

Here is a step-by-step breakdown of my workflow that consistently leads to the problem:

I place a video clip (almost any video file, for example H264 or H265 file 8bit or 10bit) onto the timeline.

I then ungroup the video and audio events (using U).

I attempt to drag either the ungrouped video event or the ungrouped audio event.

The dragging motion is extremely jerky and laggy.

Crucially, this problem does not occur with any of the following:

Dragging the video and audio events when they are still grouped or Dragging them together.

Delete one of the ungrouped events. For example, if I delete the video event, the audio event can be dragged smoothly afterward.

Dragging any standalone media files (such as WAV or MP3 audio, or separate video files) on the timeline.

This bug appeared in my VEGAS Pro 21 and 22 as well immediately after I installed VEGAS Pro 23, and it affects both new and older projects in all versions of VEGAS PRO 21,22 & 23. I have already tried reinstalling VEGAS Pro 23 and my graphics drivers, but the issue remains.

Has anyone else experienced this specific behavior.?

I have also attached a short video clip that demonstrates the laggy and jerky behavior for easier diagnosis.

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Comments

RogerS wrote on 9/26/2025, 2:25 AM

So it's a media specific issue?

Abdali wrote on 9/29/2025, 9:54 PM

So it's a media specific issue?

I don't believe it's a media-specific issue.

I've tested a wide range of file types, including ProRes, H.264, and H.265 (both 8-bit and 10-bit), and the issue persists across all of them. As I've noted, the problem only began after installing VEGAS Pro 23,the issue is replicated across both of my computers, and it is present regardless of the recent Windows update.

RogerS wrote on 9/29/2025, 11:27 PM

Thanks for reporting this. So both computers and with a variety of media. Could you provide a simple project with sample media for us to test on different systems? What's the common cause I wonder.

Reyfox wrote on 9/30/2025, 5:22 AM

I too see the same results on my computer. With VP22, it is not an issue. I can slowly move either audio or video smoothly along the timeline. Of course, large movements take a moment to catch up, but putting a clip where I want is easier in VP22.

Abdali wrote on 10/1/2025, 11:36 PM

Thanks for reporting this. So both computers and with a variety of media. Could you provide a simple project with sample media for us to test on different systems? What's the common cause I wonder.

Okay i will do that. should i provide a google drive link.?

RogerS wrote on 10/2/2025, 1:45 AM

@Abdali If you could I'd gladly download and test what you share! Please tag me then.

Abdali wrote on 10/2/2025, 1:04 PM

@Abdali If you could I'd gladly download and test what you share! Please tag me then.

https://drive.google.com/drive/folders/12c_Jbd4xCgFFKa49pbrnUFGbIFOqaWh9?usp=drive_link

Here you go.

RogerS wrote on 10/5/2025, 11:26 PM

Thanks @Abdali, now I see what you are reporting. It's not an issue with playback but rather moving the audio or video once ungrouped. My normal workflow involves unrelated audio and video tracks so I didn't notice this.

Abdali wrote on 10/6/2025, 2:34 PM

Thanks @Abdali, now I see what you are reporting. It's not an issue with playback but rather moving the audio or video once ungrouped. My normal workflow involves unrelated audio and video tracks so I didn't notice this.

Yes, you've described the problem exactly: the playback is fine; it's the dragging motion after ungrouping that is the main issue.

Did you experience the same lag when you tried to reproduce it on your system? The most confounding detail for me is that after installing VEGAS Pro 23, this bug started happening in both my VEGAS Pro 21 and VEGAS Pro 22 as well.

Reyfox wrote on 10/6/2025, 3:52 PM

What if you reinstalled VP22?

Abdali wrote on 10/6/2025, 11:14 PM

What if you reinstalled VP22?

Appreciate the suggestion.

I already tried reinstalling VEGAS Pro 21,22 & 23, but unfortunately, it did not resolve the issue.

RogerS wrote on 10/7/2025, 12:53 AM

Thanks @Abdali, now I see what you are reporting. It's not an issue with playback but rather moving the audio or video once ungrouped. My normal workflow involves unrelated audio and video tracks so I didn't notice this.

Yes, you've described the problem exactly: the playback is fine; it's the dragging motion after ungrouping that is the main issue.

Did you experience the same lag when you tried to reproduce it on your system? The most confounding detail for me is that after installing VEGAS Pro 23, this bug started happening in both my VEGAS Pro 21 and VEGAS Pro 22 as well.

Yes, I experienced it when I checked in 23; haven't yet checked other versions.

Abdali wrote on 10/9/2025, 8:57 PM

Thanks @Abdali, now I see what you are reporting. It's not an issue with playback but rather moving the audio or video once ungrouped. My normal workflow involves unrelated audio and video tracks so I didn't notice this.

Yes, you've described the problem exactly: the playback is fine; it's the dragging motion after ungrouping that is the main issue.

Did you experience the same lag when you tried to reproduce it on your system? The most confounding detail for me is that after installing VEGAS Pro 23, this bug started happening in both my VEGAS Pro 21 and VEGAS Pro 22 as well.

Yes, I experienced it when I checked in 23; haven't yet checked other versions.

Thanks so much for confirming the bug in VP23!

Since it also spread to my older versions, do you think the VP23 installer made some kind of permanent change to an internal setting.? or modified a program file that all the VEGAS versions rely on.?

Abdali wrote on 10/14/2025, 8:50 PM

Anyone.?

Abdali wrote on 10/28/2025, 10:59 PM

NEW FINDING

I have discovered a critical factor regarding the "jerky and laggy dragging after ungrouping" issue: i think it appears to be dependent on the display resolution.

The issue completely disappears when I switch from my 1080p Monitor to edit on my 4K TV (with the PC resolution set to native 4K). Editing is entirely smooth.

When I switch back to my 1080p monitor (without changing anything else on the system), the problem immediately returns.

The issue for now seems to be a display-related performance or drawing bug.

Hopefully helps narrow down the cause.

Abdali wrote on 11/7/2025, 9:16 PM

Did anyone else besides @RogerS experience this issue on their system.?

Jack S wrote on 11/8/2025, 6:08 AM

@Abdali I downloaded your clip and ungrouped. I have no problem moving the ungrouped events. Moving fast or slow, no lag.
My monitor is 1920x1080. File I/O is default. Preferences/Video is default. GPU is NVIDIA GeForce RTX 4060 Ti.

See attached video.

frmax wrote on 11/10/2025, 2:09 PM

Same here, tested your .veg and video. No problem as described by you. Then I grouped the video and audio tracks again, moved them several times, then ungrouped them again, but still got the same result as Jack.
(4K monitor here)

Abdali wrote on 11/12/2025, 8:42 PM

@Abdali I downloaded your clip and ungrouped. I have no problem moving the ungrouped events. Moving fast or slow, no lag.
My monitor is 1920x1080. File I/O is default. Preferences/Video is default. GPU is NVIDIA GeForce RTX 4060 Ti.

See attached video.

Thank you for taking the time to test the clip and confirm your results! That is genuinely appreciated.

I have a quick clarification question:

Did you open the video in the exact VEGAS project file (.veg) I attached, or did you create a new project of your own and just import the video clip.?

Abdali wrote on 11/12/2025, 8:43 PM

Same here, tested your .veg and video. No problem as described by you. Then I grouped the video and audio tracks again, moved them several times, then ungrouped them again, but still got the same result as Jack.
(4K monitor here)

Thank you for confirming the exact same result as Jack S. It looks like the issue is very specific.

I guess it truly is just a very small handful of us who are experiencing this strange bug.

andyrpsmith wrote on 11/13/2025, 4:42 AM

Just tried your veg file on a 1080P monitor and I see slight lag especially with the sound file and slightly less lag with the video file but it is there.

andyrpsmith wrote on 11/13/2025, 9:46 AM

Tried the clip with V22 and get the same, so on my PC not an issue just with V23.

Jack S wrote on 11/14/2025, 8:49 AM

@Abdali

I have a quick clarification question:

Did you open the video in the exact VEGAS project file (.veg) I attached, or did you create a new project of your own and just import the video clip.?

At first I did just import the clip into an empty project. After reading your question though, I downloaded the project file and used that. Same result I'm afraid. No lag at all.