In that cell are 2 FireplaceWood01Burning [MSTT:00035F4A] sort of back to back [ edit: they are overlapping ] (to fill the space) in the fireplace of the ruined house.
Did a test - with embers installed - I loaded up skyrim.esm only again but without that one mesh. No crash. With mesh it crashes loading that POI cell. Then I went to WindhelmPalaceUpstairs02 (where Ulfric's room is) There are five instances of that mesh there.(not so in ..01 with same fireplaces) it did crash when I touched the mesh to look at it in upstairs02 - bad mesh - I guess CK doesn't like it.
CTD (1 comment)
Did a test - with embers installed - I loaded up skyrim.esm only again but without that one mesh. No crash. With mesh it crashes loading that POI cell. Then I went to WindhelmPalaceUpstairs02 (where Ulfric's room is) There are five instances of that mesh there.(not so in ..01 with same fireplaces) it did crash when I touched the mesh to look at it in upstairs02 - bad mesh - I guess CK doesn't like it.