idk how this appeared. Truces, cbs, etc. become forever. Remaining time doesn't change.
same here, got a non-aggression pact with the north and it doesn't change. Also I can't form alliances since the option is missing, and after making the pact with the north, the non-aggression option disappeared for the other factions.
I'm playing with normal wars
I've experienced this as well. I've also noticed that when Westerlands makes peace with someone they stay at peace.
Occasionally, there is a border incident that changes whether a faction is still in a truce. That has happened to me with Dragonstone and Westerlands. They can attack me if they want but I still can't attack them.