since [this thread](https://boards.pbe.leagueoflegends.com/en/c/client-new-features-feedback/xE2svOZA-semi-locked-camera-change), pressing 'center camera on champion' should center the camera so that your champion is in the center of the screen. however, it no longer does this - it is back to its original function, where it re-locks your camera at the last semi-locked camera offset.
1. select 'semi-locked' setting for camera mode
2. load into game; press + hold 'ccenter camera on champion' hotkey and (while holding) move camera to create a different camera offset. release hotkey.
3. press 'center camera on champion' hotkey
4. notice that it re-locks camera at the offset you used in step 2, instead of in the center (as per the changes in the aforementioned thread)