So you can't march them out towards your own territory?

I've had cases where my ships were caught in the enemy land after peace. If I tried to move then onwards, it would force me to declare war. But I was able to sail out to the ocean freely (towards my land).

Actually I don't remember i tried to give them direct order to my land or not. They were so far from my land ~15-20 tile.

Something similar happened to me. I entered a civ's territory and only after i've taken a few steps i actually discovered the civ (the diplomacy tab opened up). Then, my unit was stuck inside enemy territory (because it was already a city), and i couldn't move without declaring war.

Confirmed I had the same issue in the June 2021 Closed Beta... Armies then started suffering attrition but I couldn't do anything other than reload and take the territories.

After encountering a civ, my ship unit was forced to leave their territory, I moved to the nearest space that was allowed. This space had no other exits and only two hexes of movement allowed. I can no longer move this unit except back and forth in the 2 hexes. I also can't disband the unit since this isn't friendly territory. So I've got a unit I can't use, can't delete, that's costing me gold every turn.

The game doesn't let me move through enemy territory to get to friendly territory either (even if I plan a move to the friendly territory directly)