German AI not buying halftracks ?

[serg3d]

I'm playing WWII campain Russians against German AI. Now at November 1941.
While quite challenging (I'm losing some battles) I've found out that German AI is an easier to play against than Finns(which is ok) and Polish(which is not ok).
The problem is that German AI not buyng mech infantry on halftracks, and buying a lot of PzII and Pz38(t) instead, wich can't carry infantry.
As result hordes of tanks, half of which is PzII and Pz38(t) go with negligible infantry support (some PzIII carry infantry, but seems not all) and become an easy prey of ATGs. BTW no motorcycler recon too.
I hadn't seen any PzIV either. Is this buyng only for the beginning of the War and I see infantry on halftracks later ? I'm aware that historically this armor (PzII and Pz38(t), no/few halftracks and PzIV) composition is correct, but infantry/armor composition is not correct neither historically, no gamewise. Historically German tank division had about four infantry battalion for each tank battalion.
I think German AI should but more infantry on normal unarmored trucks and at least some motocyclers.
I'll try to play with AI tank heavy turned off for now and see if it better.