Everyone knows about the bug that lets the AI do Carrier Port Strike with CVLs, even though a human can't, but I just spotted something else strange:
As you can see at the bottom of the screen, those FRA 2xSS have just done a Carrier Port Strike on Gran Canaria.
They used to be in a fleet with two cruisers and Bearn, but I sunk those a couple of weeks ago, and chased the submarines most of the way to their base in the Carribean. They were obviously still set to Carrier Port Strike even though their carrier is about 1000km west, and 1000+m down. 
As you can see at the bottom of the screen, those FRA 2xSS have just done a Carrier Port Strike on Gran Canaria.