v.1.0.0.19987 (8899) AI stacking 100+ divisions to cross a strait

[Kinkejoo]

In my game as Italy, my German AI ally has declared war on the Nordic countries. But since they don't have naval superiority, they try to cross the strait shown on the screenshot below. The problem is they're stacking more than 100 divisions to try to cross this small strait up to the point where their divisions have low supplies.

I've also attached a save game which is at the same point in time of when I took this screenshot.

 

[Galarel]

I had the same problem in my game. After 2 years and around 350k dead Germany managed to cross that strait....