I'm hoping that over the holidays I'll find time to take down our forum, remove the software and then make a clean install. We'll see if that fixes the problem.
Server Information UBB.threads Version 7.7.5 Release 20201027 Server OS Linux Server Load 0.16 Web Server Apache/2.4.6 PHP Version 7.4.33 MYSQL Version 5.7.43 Database Size 1.85 GB