Thanks a lot for the report! The bugs 1. to 3. already got reported and fixed but I didn't knew about the last one.
Will fix that as well, thanks!
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Come to think of it, are bonfires the only events in random dungeons that use TP?
Since the yellow magic circle can restore TP, it might add some variety if there were treasure chests that could be obtained with specific abilities, like the slime ability or the jaguar's jump, or if there were ways to avoid combat with enemies. (If it's difficult or time consuming, feel free to ignore it.)