When using Roblox studio, if your camera is too close to a part you are rotating, it will not rotate.
GIF of it happening: https://gyazo.com/2a1bce36afe076e9c7af246be76863a9
Rotate Bug Repro.rbxl (17.4 KB)
As far as I’ve seen, it happens anywhere when rotating large parts (roughly 75+ studs). Also as far as I know, it just started happening recently because I’ve never run into this before.