As the title says, Geary 43 seems to turn into a blank window when left minimized for too long. Also seems to happen after waking the computer up after having the window minimized for some time.
If geary is not set to check for mail while closed, closing the window and re opening geary fixes the issue until it happens again. I can provide a screen shot the next time it happens.
Version 43 installed from repo, not flatpak version. System is up to date.
Currently have geary launched via command line, will post any interesting output when the issue occurs again.