Minecraft mouse sensitivity

After the update, I began to open my survival world, then later when I'm moving my mouse to navigate my avatar, the response of the mouse to my avatar is having a delayed time to move. So I'm having a hard time at first, but then I tried to exit my world and reopen it again and I think this "bug" was removed and it came back to normal. I just want to let you know if it is a bug so it can be fixed sooner