Hi!
I decided to investigate this so here's what happened:
I checked out viris_laborer, and I only saw the 2 feet flames. So I looked to see if the head on was activated, and it wasn't. So I turned it on.
In game, the head one kinda shows for a few frames - as in you can see a few tiny particles around the neck area, then nothing after that.
So I've came to the decision that the flame is borked, either by the settings when it was forged, or by the game's recent updates.
I advise anyone having flame problems with the beta version to post in the beta problems thread *points at the support stickies*
If the problem's still there when 3.8 is finished let us know & we'll sort something.
As a final note - leave the picking on support mods to me ;)