Seler Favelnim disappears when his quest is accepted

https://en.uesp.net/wiki/Bloodmoon:Bar_Brawl

Seler Favelnim is inside the bar in Raven Rock. But as soon as you talk to Falco (haven't tried Carnius) and get the journal entry to deal with him, he'll no longer be there.

UESP writes this:

Seler may disappear when this quest is accepted. This bug happens more often with MPP 1.6.5 because a syntax error that the Morrowind game engine and the Construction Set usually ignore was fixed. The issue resides in the PositionCell command in the script used in a wrong way. MPP 1.6.6 fixes this issue.

I do not use any unofficial patch, and the suggested fix PlaceAtPC "Seler Favelnim",1,20,1 will spawn a copy of him that is visible while the game is paused with the console open but will instantly disappear when the game resumes.

Haven't had this happen in Morrowind with or without patches, and in OpenMW it used to work before, so this might be a recent regression.

0.48.0 rev. 826553f2bc