Ok so they know that there is a bug with swimming that sometimes can cause what is happening to you.
Swimming basically works now by having the player on a invisible platform in the water, (I don’t know why they changed this) this platform can get caught and won’t let you out. You can do a Double Jump Glitch in a few spot and basically get past each one but it isn’t super easy. However you can do a strafe that will eventually work. Dive down and come up and strafe the edge until you see the character start to rise. It usually happens near corners. it also seems to be a bigger issue for Female toons than male. It may also be a result of character scale slider (making your character taller or smaller than default which also breaks clothing and hair physics)
The best thing to do is dive down and then come back up and flank the edge until you see yourself starting to rise. Once you fix get through it once you can get through it every time. The Devs were able to reproduce it, but then the jump happened and had a hard time reproducing it again.
I haven’t had an issue since I did these videos for a dev. They would have to make some changes to swimming to get this to work. Here are the two videos I did just before release.
Turn off the Sound they are the first two time I ever captured and totally forgot about the reverb.
both of these show the strafe that will get you out… sadly neither shows all my little tricks.