Playtime: GUI bug when resizing Playtime window

[dnull]

My REAPER project shows a bug when resizing the Playtime window. This bug is tied to a specific REAPER project (see attachment in step 1). I was unfortunately not able to deliberately produce a second REAPER project which shows the same bug.

Versions

Helgobox 2.16.0 #0 (also observed with 2.16.0-pre.18)
REAPER v7.18

Steps to reproduce:

1. Load the attached project in REAPER (2024-07-16 Session 1.zip)
2. Click on button "Show Playtime".
   
3. Click on the full screen button of the Playtime window.
   

Expected behaviour:

The Playtime window is shown in full screen and can be used.

Actual behaviour:

The window flickers for a moment but is not shown in full screen. Instead, it is displayed with a trimmed border and all mouse inputs are received by the underlying REAPER window. This situation can be resolved by a second click on the "Show Playtime" button, after which Playtime works normally and can be successfully resized to full screen.

[helgoboss]

Thanks for the report, I will look into it as soon as possible.

[atencion]

Yes, same strange behaviour here. No matter what project I^m on. Thanks!

[helgoboss]

Probably connected: (Re)opening app on Windows sometimes shows blank window. I should look at this as well. Treating it as the same issue for now.

[helgoboss]

I was able to reproduce it. Trying to find the cause.

[helgoboss]

This happens on Windows only and is related to restoring full-screen mode right upon opening the window.

My solution: Not restoring full-screen mode when being on Windows. It's not a big loss. It just means that you manually need to go into full-screen again after you force-closed the window (via X button or by closing project/REAPER) and reopened it. There's still the Strg+Shift+P action/shortcut which just shows/hides the window instead of force-closing it, correctly restoring full-screen mode.