Crash dive at periscope depth,big problem!!

[Dogfish40]

I got my self in a jam with a convoy and found that my ship was about to be rammed (by a ship that should have been sunk anyway.) I torpedoed this ship and I had my concentration on firing on a couple more at periscope depth so, after I fired a couple more eels I look to starboard and this ship is bearing down on us. I ordered a crash dive (I'm already at periscope depth) and I hear "ALARM" all the stuff I should hear exept that we surface instead of diving!!!! What the heck!!! Well, I'm not taking this one as a Dead is Dead loss. I tried it again later after going back and playing the last two hrs again. It does it repeatedly
With the currant mod set, at periscope depth, the ship will surface if I order crash dive.
When did this start??
I am using the latest TDW UI 7.2 and the latest patcher.
I am playing stock, but before I post my list,... Does anybody elses do this??
Go to periscope depth and order a crash dive. It used to crash dive.
(I'm pretty sure anyway).
Thoughts??
D40