For the sake of being brand new content, I've hidden the post below in the spoilers.
In the 5.4 Eden cutscenes, the Prime form of Loghrif and Mitron seem to have their glyphs and masks inverted. When facing the player, Mitron's mask is on the right, but Mitron's glyph is on the left. Likewise, Loghrif's mask is on the left when facing the player, but Loghrif's glyph is on the right.
It should be noted that Lahabrea and Igeyorhm's merged glyph matches what side their masks are on, so the inconsistency is only on this model.
Date & Time: 12/8/2020, but any time
Frequency: All the time
Monster name: Mitron/Loghrif Prime
Class/Level: 80
Party or solo: Party.
In-game time: All times.
Area and coordinates: Eden