Before the patch, I had all but 4 categories max level. After the patch, all are at Level 1, no xp on any category. Patch notes do not say that all Overseer Levels were reset, so I'm wondering what's the deal, here.
It's a sync issue with the backend servers. Zoning/logging off and on/etc fixes the issue, although sometimes it can take a few tries if really laggy.
If your Overseer exp didn't come back after relogging / zoning, please send me a PM with your server & a character name on that server. Thanks