AI just stopped building units

Playing against Russian for about 45m with PE and suddenly the AI just stops producing units.  I watched the replay and he had 3k MP and 800 fuel banked so it was not a resource issue.  On the Psel map fyi.  Anyone else seen this happening?

I've seen it happen on the Prague map. Ostheer AI would simply sit around in its either from the very beginning, or it would play normally and then 5-10 minutes in would break and just start sitting in its base.

I was playing on Kursk yesterday as the ost and my ai ally was Wehrmacht. . When we went to place our first buildings his blew up and he just sat there. Not building any units or tier buildings . This went on for 10 mins until I sent team order to defend middle of map . Then it seemed to wake up the ai and get him moving and building .
Same map, different match . Ai ally built units but they were all in home sector . Not capping or harnessing . I think part of the issue is based on what the ai can see of the map , what you or it has revealed determines part of its priorities .  The geography and resource placement factors into this I think as well. Sometimes giving the team order works . Of course this does nothing if your opponent is the one not building or attacking .