Display glitching and showing old frame data when switching between fullscreen and windowed mode

[LoveBug2084]

I have this weird issue , I think I had reported it before on stardot

This is the latest build I compiled from here but still the issue is present, see the video below BTW the emulator is running at full frame rate but SimpleScreenRecorder captured at a low frame rate

I always start the emulator with the -fullscreen option and usually it is ok but occasionally can glitch even without switching screen mode

https://github.com/stardot/b-em/assets/87623090/2a347744-ea7a-4090-9051-5647ac2f29d7

[SteveFosdick]

I do remember something like this in the past. I will have a look to see if I started work on solving it.

[SteveFosdick]

See https://www.stardot.org.uk/forums/viewtopic.php?p=457498#p457498