LOSS OF HIGH COMPRESSION AIR
 

I think I might be missing something here. I have been running U boats for the first time. I would say about 20% of the time when I dive I begin to lose the Compressed air. It begins to drop after I have submerged and steadily runs out in a short period of time.

Is there a bug affecting this or could I simply be forgetting to do something since I am not as proficient at running U boats as I am the American Submarines?

It has never affected performance or my ability to ascend it is just something I have noticed happening.