same feeling,
the russians has two lightly defended provinces, and a larger force behind. I get one stack in one of its province, and his reserve stack moves into it as well. I reboot, change region, and surprise surprise the reserve stacks changes too.

I'm in expert, and I hadn't noticed that in normal (where on the contrary the AI alsways seemed to take bad decisions).
+ even in expert the AI has more often than not taken bad decisions, so I'm not sure of what to make of it.