Chrome (Version 108.0.5359.99 (Official Build) (64-bit)) is set to delete all browsing date at close except log-in cookies. Removing that one SSO cookie and logging in manually creates a new cookie and restores all permissions for a while.
I do not consider this significant because it might take frustrating hours to find the cause while doing the delete and manual log-in is a few seconds once in a while. The "4:43 am/4:43 pm" issue is a curiosity and does not truly affect my use of the site.
I can assure you that I have stranger problems. Going to my credit union's log-in page shows that it remembers me by a greeting with my name inserted but it never remembers my username for log-in. It worked properly before we moved and began using a different ISP. The credit union's IT state they have seen the problem before but have never found a cause or cure. Their sole hopeful sign is that the problem often goes away when the customer buys a new computer. This is the only computer we have which can access the Internet and so I can not test if the computer is to blame.
I do wish to take this opportunity to thank you once more for all the work which you do for this site. We are very lucky to have you.
. Yes I am proud of myself 
I knew the answer right away. I knew the answer in about .7 seconds. Move over, Google.
At least on this one. Why, if this was the College Bowl I would have beaten out those geniuses. Sudden memory : Three College Bowl participants could not utter a single correct answer when three classical pieces were played. I got them in .5 seconds each. They were not difficult. War horses actually. I won't mention what they were although I remember two of them. Am I beginning to be insufferable yet? 
It's about time. Yuck!