Players left as ghosts if not thrown off a cliff or into deadly liquids

[theastropath]

Based on Argick's stream, it seems like you sometimes don't die properly and get left at 0 HP, able to move around but not fire weapons. Don't have a good idea as to why this is happening at time of raising this issue.

https://twitter.com/JKArgick/status/1583912794604249088

[theastropath]

If a flood effect starts or ends while you're dead, it throws you into the swimming or walking state and leaves you as a zombie.

Need to check to make sure the player is alive in UpdateAllPawnsSwimState before doing anything to a pawn