When doing the quest in town after the first Oblivion gate, the guards didn’t follow me into the building. Had to look up how to finish the quest to continue.

After that, the PoI marker for bringing Martin back to the monastery was at the wrong location (close to the edge of the map & high up in the sky), so quick travel killed us both. Had to look up where the monastery was to continue.

So pretty average Bethesda stuff.