Are you having the same issue when fishing with a sim that isn’t a fairy? Being a fairy shouldn’t cause issues with fishing.
If you use mods/cc,try moving the whole mods folder to another place, delete the localthumbcache.package and then test to see if the issue remains without mods/cc there.
If you still have issues, try resetting your sims 4 folder, and testing in a new save game without putting back any of your data in the sims 4 folder and see if the issue remains.
https://sims4.crinrict.com/eng/2014/09/resetting-the-game-to-factory-settings-without-reinstalling/