Hi! Thank you for playing Emberfate! I'm sorry to hear you're encountering technical issues with the game. Admittedly that's... a really strange bug, and I've not been able to replicate it on my end while attempting to repeat the steps you mentioned.
You mentioned there was an error that popped up and you had to close the game -- would you happen to have a screenshot of the error message or remember what it said roughly? Additionally, if you still have that bugged save file, would it be possible to send the save file to me directly in private so I can test it personally and try to figure out the issue? I'm available on Discord at Windchimes#1995 if you'd like to send me the screenshot / save file in DMs (or need further directions on how to find the save file on your PC for sending)!
Again, really sorry about the inconvenience and issues. I'll try my best to investigate and fix the issue as soon as possible.