XCB error: 2 and incorrect rendering at first run over SSH forwarding

I have a simple PDF viewer program   https://github.com/amkhlv/pdq  which I run in container using  ssh -X .   When started first time, it reports many errors of the type:

QXcbConnection: XCB error: 2 (BadValue), resource id: 1024, major code: 130 (Unknown), minor code: 3

and rendering is all wrong (cannot resize window, garbled text on dialogs etc)

{{This only happens if I run it forwarded over ssh -X }}

If I stop the program and run it again, it runs perfectly fine. Only the very first run is problematic.

It seems that the first run somehow changes the state of the X server, and this change corrects the problem. (If so, would it be possible to just execute some command at startup, which would cause the same change?)