At first I thought something was weird when I'd tab out, but a reload ui did not fix it. Only logging entirely out of a character and back in will fix this issue.

What is happening is that my reputations from old expansions, back to classic, are vanishing from the list at random. The only one that remains other than the ones from dragonflight and TWW is from Battle of Azeroth (the one I'm doing) and it's only the Champions of Azeroth that stays. All others just vanish from the list entirely until I relog.