The actor and ambush work exactly as intended, with one annoying exception: after being killed, the NPC isn't searchable/lootable - his inventory can't be viewed, and clicking "Search [NPC name]" gives no feedback other than the soft default "nothing happened" sound effect.
Here's my checklist so far, yielding no change or improvement:
- Other NPCs' inventories (in the same cell, starting as dead) function correctly
- NPC's inventory functions correctly if he's placed directly into the cell and not an ambush
- Made custom race, and NPC itself, match default ambush Draugr in all ways in any way relevant to inventory and equipment settings
- Positioned the alcove marker (ie, what the NPC ambushes/gets up from) at the exact same Z location relevant to the ground as the default ambush
- Inventory contents are items flagged as playable, function correctly
- Aforementioned items exist in NPC's inventory, are not equipped
- NPC outfit (Draugr beard) exists in NPC's inventory, is correctly equipped & displayed
- Cell is navmeshed, navmesh works correctly for actor movement
- Cell's room bounds contain entire cell contents with generous padding