This has happened in several places and has been happening for some time and has been almost constant.
I am editing a project and when I press play (F5) sometimes the 3D area is not shown.
No sure if I understood your question correctly, but the rendering happens, it’s just not shown, that is, the script works without interruption, but the screen is not refreshed correctly. Double-clicking the Client/Server button works around the problem.
Another workaround is to adjust the studio viewport size by dragging the title bar a little bit. Client viewport may be unbound to handle the rendering right after entering the server.
The problem remains the same.
But, following @ProBaturay 's suggestion, I dragged the title bar to take Studio out of maximized mode and then the 3D viewport was shown.
As time goes by, bugs accumulate and developers have to create more and more workarounds… I already have several routines that, as you said, unfortunately we have to get used to them…
We needed to flip a flag to activate the fixes that shipped in Wednesday’s release. This usually takes a short amount of time after Studio updates but there was an infrastructure issue that prevented it until this morning. But it is now turned on.
Please fully restart all instances of Studio, verify version 0.570, and let us know how it goes!
The problem has subsided, but it has happened 2 times today.
Yes
The 3D viewport just doesn’t appear, sometimes, when I press Play. When hit Stop, it always appeared.
I didn’t even know this existed. What for example?
There’s no way, because this happens randomly, and I only noticed after I pressed Play (or I used F5, I don’t remember, and I don’t know if that makes any difference in this error).
I appreciate the additional info! This does sound related to refreshing the viewport (and not docking). We have a second fix for this that should go live on Monday.