ditto here - all ok

Repro-ed.

Steve and Leslie I had to follow EXACTLY what the OP wrote, and I did repro this. I've experienced this and just did a mental shrug of the shoulders and got on with editing . . . It's as if the LAST Control had/has control and wont pass over to the newly acquired Control, ie: Going from Project Media to Project Preview. Probably the way that Vegas is programmed to deal with what item has control at that time. Dunno....

Grazie

I did precisely follow the OP's steps, and then a few other combinations of my own. None failed.

ditto steve's experience....

these things are sent to try us ;-)

Sure, understood Steve.

OK, could it now be down to the differences in the arrangement of our respective Window Pane Groups/Docking. Somewhere in the dim past I'm remembering issues emerging from how panes of Vegas Docked Panes are arranged.

Grazie

I'm using the french version of Vegas pro 13.
Reboting the Pc and creating a very simple project : same bug - always present.

I'm using 2 screens :
Screen 1 (right) is a 1920x1080, 120 hz monitor (Asus) With the 3D vision kit from Nvidia - driver 340.52.
Screnn 2 (left) is a 1920x1200 Belinea monitor.

I get the same problem with only one screen. Id est all panels anchored in the same window.

I'm using 2 audio cards, and frequently swap from one to the other : Creative Xfi or Tascam Us 600.
But I only swap when opening/creating another project.

Finaly, if you select another scene and click back on the one you want to have a look at, there is no bug.
Bug only appear if you just click the play - stop buttons as explained above.

Seven (pro, french) is up to date (Windows update), 24 Gb Ram but only 1.2 Gb space for swap file.
The only other audio software installed are Cubase LE5, Audacity, Spotify.
I had uninstalled Vegas 12 / rebooted the pc prior to installing Vegas 13.
15 gb free space on C (ssd), but ALL files used /created by Vegas are written on another WD drive, 637 gb free space today.
Processor : I7 /12 threads, 3.2 ghz, NOT overclocked even if it works fine at 4.2 Ghz.

I'm using Linux for internet applications, Gimp& Blender. Most of the time, the W Seven gateway does not allow Seven on the internet.
Before writing, I checked my computer with
- chkdsk c: :f
-Malwarebytes
-Avast
Notihng wrong was detected.

I understand some of you cannot reproduce this bug and do not know why.
My post was simply to inform the Sony team - it's a minor bug.