It would not only helpful but beneficial if you confirmed both the model number of your handsets and the android version your currently experiencing the issue with.
Here is the detailed of handset that is facing the problem.
Model No. - TA-1053
OS version - 8.0.0
Now camera freezes 5-7 times out of 10.
Same problem here after updating to Oreo. The camera app is slow to load and laggy! I haven't been able to take a single picture with the phone since updating because by the time the camera takes the picture, the subject has changed.
I have a TA-1024