When you throw in your fishing line, and abruptly cancel it during the throwing animation, if the hook lands on land, it softlocks your character in the idle state, unable to perform any action, or open any menu.
Waiting until the end of the natural day takes you out of the softlock, but leaves you with a permanent water animation at the location, where the fishing hook landed.
Steam version, 1.1b-1231
Input method is kb/m, but likely irrelevant
I am unable to reproduce this consistently, so it is some kind of an edge case