When you have an unanchored part, and its moving and selected and you hold f, it teleports the camera to the part once and does not follow the part even while holding F.
To reproduce this, spawn a part high up, unanchor it then hold F and your camera will only teleport to the part once, instead of following the part.
Specs:
CPU: Intel Core i5-8365U
GPU: Intel UHD 620
RAM: 8gb
Expected behavior
The camera used to follow the part while it is moving when you are holding down F, but now it only teleports to the part once and it requires you to spam F to reproduce what it used to do.