When moving the cursor while in your inventory/pause menu, the player view can occasionally teleport in the opposite direction that your mouse was moving. In addition, it seems like the distance it teleports depends on how much you moved your mouse before exiting your inventory/pause menu, but I'm not 100% sure about this. I originally thought this bug was related to this bug: https://bugs.mojang.com/browse/MC-134546

However, after force updating my glfw to 3.3.6, I solved the inventory delay bug but not the mouse teleportation bug, so it's probably unrelated to that.

Note: I've experienced this bug since at least 1.16, so it isn't a new one. I'm assuming it's probably an lwjgl/glfw bug since the 1.13 update (which updated Minecraft's lwjgl) introduced many other mouse-related bugs on macOS.

video: https://youtu.be/AGAKm_pb6IM