@Brag.
I have the same problems. Lost saved games and these are the mods that are installed:
Thomsens Ships V4.1
GWX - Main movie - 'Das Boot'
LifeBoats&Debris_v4
GWX - Merged Campaign
GWX - Bearded faces
GWX - Das Boot Clothes
GWX - No Bell Ring
OLC 'Gold' MkII ~ Option 3 ~ Environment with EDE and GUI
Unofficial_rockets_fix_GWX3.0
OLC's Modified Searchlight Beams for GWX3
Internal U-Boat Sound Effect
Water Droplet Mod
Flags_enlighten
Pascal_Port_People
WBs Mission Orders Lite
There are no conflicts mentioned by JSGME.
It's really frustrating to loose all the patrols you've done.
I suppose the following:
1. Never save when submerged. Only surfaced!
2. Never save when enemy is in your sight.
3. Probably NEVER save over an existed save. (over write it).
Am I right?