I have had multiple game saves where ships which are fully deep sea capable stay and explore within the same 4-6 tiles of the map, this occasionally happens with some of my ground troops but not nearly as often since every ship I've had does this no matter how advanced down the tech tree I am.

I have tried relocating said units and enabling auto explore after but that does not work, Reloading a save or reloading your game doesn't seem to work either.

Sometimes I have been locked from a save due to the AI taking an infinite amount of time either attacking me or attacking each other. Reloading the save or game did nothing to help.

The combat AI (Auto Battle) will sometimes throw away an easy win simply refusing to attack.

Whenever an event happens in-game I can sometimes see territories owned by other factions for a split second even though I have never even explored that part of the map.

You can basically see through the fog of war occasionally when you select a unit it shows the combat symbol over a tile even though there is no vision there at all.

These are currently all the bugs I have encountered.