Confirming that this specific bug doesn't occur anymore! I did run in to other issues relating to the shop menu, but that was much more fixable ad-hoc than this bug was. I also seemed to have lost my save file, but I'm chocking that one up to Steam Decks being weird, and I wasn't far in to the game on that file anyways.
Happily able to continue playing this again, thank you for updating the game!
Happily able to continue playing this again, thank you for updating the game!