I'm having an odd issue where AI planes tend to be destroyed just before they taxi, taking out any planes near them. It only happens in MP, and only if another client is connected. It isn't tied to a single airbase. I had several flights across two enemy airfields detonate, with slightly different taxi times, at the same instant. They never even started to move, just boom. Seems like its maybe a hiccup in the MP code? They work fine if I replay the mission with just me on the server.
E: I was able to solve my issue by letting the game run unpaused before the client joined and using distant unit culling.