I also notice this behavior. I have my regions in my profile set to 100, but during sessions, I notice that it is changed to Max Regions. Even if I set it back to 100, it will get changed to Max Regions at some time. This seems to happen if I pause my sequence, or go to the blind solve manually while setting up for the night. I'll try to see when this happens, but before I leave it running for the night, I always check that it is 100, so not to kill too much time on a meridian flip in a star rich region.
Frank Z...