Grand Campaign - Pergamon
Pergamoi Thueros Machairaphoroi appear normally after theuros reforms, then disappear completely -- and cannot be recruited even during that one turn when they first appear.
I immediately recruited 2 of them the same turn as the reform. On the following turn, I noticed they did not recruit and were now missing completely from the roster. Reloaded the save and the 2 that were queued to recruit had an infinity sign over the unit cards! They did not recruit either and then disappeared from the roster altogether. Also vanished from the list when hovering over a barracks.
Had played a Pergamon campaign recently within the Macedonian Wars campaign and these units were fine (just before 2.5).