bug when loading a savgeame

[Propy]

I was on a mission to photograph a port and was closing in on it in shallow waters. But I forgot to switch to silent mode and suddenley (after a stupid depth meeting ping) there were three destroyers attacking me. They destroyed my batteries and diesel engine, so I was laying dead a periscope depth. I sunk one and damage another with torpedoes before I touched the seafloor. I surffuced and thougt I maybe can destroy the las one...but I was sunk...

So no other choice but to load a savegame...I had saved just before I entered into the shallow waters...but when the loading was done and I started to move my sub just started to sink without any damage...

this happened a couple of times with the same save, I had to load an older savegame on the same mission (which worked)...does anyone know about this. I tried to search it but couldnt find anything...