No worries KageTheBeast, I’ve moved your post to a new topic so I can address it directly! (I know there’s a copy in the other thread but I wanted to ask you about the bats…)
If you do find it is the same spot or near a particular wreck, please let me know.
Do you hear the sounds when swimming underwater or is usually when you’re on the surface?
With regards to the interactions issue, rather than the interactions sinking, something appears to be blocking the interactions above a certain level. In case you didn’t see it I updated my post on the issue here - [Known Issue][PS4/XB1] Loss of interactions - the team believe they’ve found the cause and are now working on resolving the issue.