PS4 Pro
Map: All Maps
Predator: Male/Female Scout (other classes untested)
When crouched on a tree branch while aiming the Plasma Caster, you stand up to aim from the crouched position. This doesn’t happen anywhere but tree branches. You stay crouched while aiming any other time.
This causes unintended standing animation that can give away your position. This definitely is part of the reason why Predator can be seen easily while in the trees. You think you’re fully cloaked while crouching and still, but then become more visible when aiming due to the unintended standing animation.
Edit: People need to test this and confirm it by liking this bug report. This is a big bug and needs to be addressed. Do you really want to unintentionally stand up while crouched and aiming?