CTD on loading campaign saves

[psykopatsak]

so i had this campaign save that i cannot load, but i could, but not anymore. i changed no mods, nothing, except playing at another campaign for a while.

there is a bug - when selecting saved game, my indicated submarine is always the same as my last sailed one, even if its from another campaign.

so i wonder, should i try to play with the same sub on the same realism setting? or is it lost forever.

also, i should mention that no saves from that campaign can b eloaded, allthough i loaded them before.