It's quite interesting that you have a save where it happens consistently. I would strongly suggest to officially submit a bug report with the save file to the team then, so they can investigate the cause of it.

You can do this by;

  • Clicking the HELP button during the game's launcher
  • Submitting an official bug report
  • Providing your save file


I would have done it myself, but I never managed to catch the bug consistently with a save, so this might be a rare opportunity to get this bug properly investigated and fixed.