Hi, Evolution831,
Others have reported the absence of transitions after the recent update. The link below contains a solution that worked for another poster with the issue.
https://discussions.apple.com/thread/251733520
The above poster found that the following worked to solve the problem. Try resetting the System Management Controller first. It is very easy to do.
Resetting the System Management
Controller
Try resetting the System Management Controller:
https://support.apple.com/en-us/HT201295
Resetting the NVRAM
or PRAM
Try resetting the NVRAM or PRAM, although this issue would be fairly rare:
https://support.apple.com/en-us/HT204063
If neither of the above work to solve it, then try some of the other diagnostic procedures that I mentioned in the link at the beginning of this response.
-- Rich