I was playing last night as the Korx and got the Jagged Knife event. They got my planet that had my Mercenary Academy.

I couldn't culture-flip them back, so I convinced the Torians to invade. Once they took they planet, I started spying to disable the influence-generating structures. In the spy screen, trying to click on one of the tiles consistently crashed the game to desktop (Fortunately, the game auto-saved that very turn).

Once I managed to flip it back, I saw it was the merc academy (I couldn't recognize the tile otherwise).

Sorry, didn't think to grab the debug.err after one of the crashes and I kept playing so the savegame is no more. It consistently crashed on my system so hopefully you can reproduce it