The issue is with the passive_wisdom attribute, not the text listed in the npc_senses attribute. If you select the flameskull and run @{selected|passive_wisdom}, it returns a 10 as Luke85 mentioned. I tried it with another npc sheet that is trained in Perception (a Behir). The same thing is happening. So, it would appear that npc sheets don't account for proficiency bonus to passive_wisdom. PC sheets seem to update the attribute correctly. Maybe the sheetworkers behave differently for pc/npc sheets? It looks like the {npc_perception} attribute is correct, so I would suggest using [[@{selected|npc_perception}+10]] for your npc macros. EDIT - we cross-posted. I see that you are using linked bars, so the inline roll I suggested won't work. If you are just using bar 3 for quick reference, I guess you would have to just use npc_perception and add the 10 in your head.