Since switching to Chrome, I have not seen this problem. I have both expired cookies in my profile and deleted all data for the domain in Safari, but the problems continued. So I switched browsers. If it pops up in Chrome, I'll follow the same procedure.
This is my admin cookie in Chrome.
a:7:{s:11:"newmembers1";s:1:"1";s:11:"newmembers7";s:1:"8";s:12:"newmembers31";s:2:"31";s:9:"alogcount";s:5:"39601";s:9:"rlogcount";s:3:"858";s:4:"modq";s:1:"0";s:9:"timestamp";i:1726641962;}
I will switch back to Safari, and if the problem pops up, I'll take a look at the cookie.