Okay I did resolve it !
It was due to an optimization I made in the main game loop (the part that handles things like stamina loss, gold gain, etc. every rotation).
Turns out, I forgot to properly remove a line of code from the main thread after the refactor, and that was triggering the crash.
I'm really sorry for the inconvenience, but the good news is:
It’s fully fixed in version 1.15!
Thanks again for your patience and support :)