Spell effect visuals are persistent after wearing off

Openmw 0.48 trunk While battling a flame atronach I noticed a red spell effect lingered on after killing it. Fighting alit gave a similar though green effect .

saving / reloading made the effect disappear .

I can reliably reproduce this with a specific modlist, but it doesn't happen without mods loaded.

Bisecting points to add6eb9c from !1298 (merged) as first bad commit .

Builds before that with this modlist don't have the issue.