Ship Stops then sinks if I dive
 

I'm encountering this weird situation randomly. Running SH5 Steam version with Wolves of Steel mod.

I'll be travelling along in open water at Standard Speed. I glanced down at my speed and it was 7 knots and dropping. Attempted all the speeds forward and reverse but what ends up happening is my ship will come to a complete stop. Speed still reads whatever I have it set to, Standard or whatever, the screws are moving accordingly in external camera mode.

I thought maybe if I dive and engage my electric motors maybe that will shake this bug. PERISCOPE DEPTH IF YOU PLEASE!!

At 10m, the ship springs a critical leak, 3 officers are dead right away, and about 15 seconds later I'm dead. Emergency Blow does nothing to prevent this.

Ideas on why this is or how to prevent it? This has happened to me a few times now at random. Open sea or at port. Thanks in advance for your input.