Strange fire effect in Rust Bowl map

Reported in game with Bug Report ID: #400864628

This is very hard to put across in a still image, but throughout this Rust Bowl map, almost every fire effect (flaming skulls, burning ground (but not flame wall I don't think)) had these showers of sparks moving in perfectly vertical lines from the source to the bottom of the screen. It covered the screen consistently whenever I or a monster used some kind of fiery skill.

I use flaming skulls a lot with this build and this has never happened before, even though I've done hundreds of maps, so there must have been some unique interaction here. Not a game-breaking bug, but distracting in that it covered the screen during fights.



In case that doesn't show, link here: https://imgur.com/a/EdHnM68

The sparks I am talking about are the tiny ones you can see in the lower half of the screen, which were just "falling" from top to bottom.