When in third person but the camera is in front of you, the camera moves in the opposite direction. Looking up makes the camera look down and you see under the player's head. Looking down does the opposite and you can see the top of your head.
Linked issues
is duplicated by 16
MC-145669
F5 does not track your face anymore
Resolved
MC-145671
3rd person camera bugs
Resolved
MC-145674
F5 head in frontal view is going the wrong way vertically
Resolved
MC-145684
Third person cameras move drastically and head is mirrored
Resolved
MC-145724
19w11a Bug (third person head movement)
Resolved
11 more links
can confirm.