I think I posted this in the wrong place the first time. This bug is still ongoing. Even if I send Tekehu out of my party, do a bit, then bring him back, he is stuck with Magran's Leaping Flames cooling down on him infinitely. This is purely cosmetic I seems, but its a bit disconcerting.
Also, on a different note, twice in the same area I had a corpse inflate to supersize. Quite hilarious. These screenshots are also in the folder above.
Screenshots attached, and save files here: https://drive.google.com/drive/folders/1S1pryL1XQzJUy6CwGWqRlrJsmIRka0JX