This is all sourced
Older than chapter 3 bugs.
Tiny Instrument Of Death can cause massive FPS drops when fired.
Players are able to unlock higher evolution levels by playing ventures
Anti-Air traps deals less damage to husks flung by a flinger in high end of twine peaks and ventures.
Chapter 3 season 1 bugs
Materials disappear when fully destroying a llama fragment while placing a cone on it.
R.O.S.I.E gets destroyed if the tile placed on it gets upgraded
Chapter 3 season 2 bugs
None
Chapter 3 season 3 bugs
Melee heavy attack doesn't deal damage sometimes
Storm king's horns doesn't glow if he is downed, but still able to deal damage to it. Happens on performance mode.
Gia no longer heals tamed wildlife if added in a hero support slot Charge fragment devices are still preventing building on them.
Source: https://www.reddit.com/r/FORTnITE/comments/x26p9j/all_current_bugs_in_the_game_at_the_moment_there/