In that stuck state, the host could not save the game. It would sometimes occur once everyone clicked “end turn” even if the turn had gone smoothly previously, in which case the end-turn button at the bottom right of the screen would either say “pending” or “ending turn” but never move on. So the problem that plagued our particular group most was the game getting “stuck”, most notably in ground battles but not only.
However, we ended up finding a workable system to keep playing, so I’m here to share it, in case that might help anyone.
We encountered many issues, that discouraged several players and almost made everyone give up. So we recently started a multiplayer group to play this wonderful game with mates. Tips to Deal with Multiplayer Instability Quick guide to deal with late-game multiplayer instability.