[Yrkoon]

Did anyone experience problems with the frozen seas spell ?

I am in a SP game with MA Oceania as a neighbor and I casted frozen seas to avoid having to fight them, but I still get attacked by troops traveling from Oceania sea province to my land provinces. I thought frozen seas prevented that.

Could it have anything to do with Oceania units having a different form on sea and land, so that the game mechanics make oceania sea troops vanish from his provinces and "teleport" land troops to my provinces, rather than walk from his provinces to my provinces ?