Apologies for the delay!
Another user has reported the very same behaviour on this exact same setup. From the tests I have run with aforementioned user, it seems like path building is absolutely mangled on Tahoe. We managed to find a temporary workaround while I work on both the update and a definitive solution for this behaviour.
Would you mind reaching out to me at gabriel.lima@cogmonkeys.com? I will send you the files through email!
EDIT: Nevermind, it just occurred to me that I can upload the files to itch instead. Please, download the one named DEBUG and follow the instructions to run the tool. This is no permanent solution as you will likely get a memory leak when closing the application. But you can, at least, use it while I work on a permanent fix. Thank you for your patience and support!