Game rendering screen randomly changes size during play

Hello,
One player reported an issue where the game rendering screen randomly changes size during play, while the UI stays the same (see attached picture). This occurred on a packaged build using version 5.3.2. It’s probably a long shot, but does anyone have any insight on this? I’ve never encountered this issue on my own computer.
The player configuration:

  • i5-11400F
  • RTX 2060 SUPER
  • 2x16 GB RAM 3200 Mhz
    Also the game is installed on an SSD as well as Windows 10 with latest graphics drivers.
    It’s also completely random and sometimes it doesn’t happen in an hour of playing. But when it happens it’s really constant. Sometimes it fixes restarting the game, but other times it doesn’t fix after restarting.