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.

Back to post

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.