Hi Clare,
I am also experiencing save issues since the update yesterday.
Single player.
Was on a new game, about 10 days in.
Went to new island, created shelter, tried to save and game froze. Sat there at least 10-15 minutes.
Restarted game, would not load.
Stuck on “cleaning up”
Started new game in new save slot.
About 4 days in went to new island, same exact thing.
If I cannot go to new islands and save, the game is unplayable.