Visual bug with "Gloom Wings" microtransaction

Bug Report ID: #100816041

I just purchased the "Gloom Wings" microtransaction and I have a weird visual bug, in the form of a black line (of the wings effect) going straight down my screen right to the bottom and no matter what I do or where I go it's always there.

Luckily, support were very helpful and nice, refunding me the purchase immediately, but I would still like to buy them, just without the bug.

I tried fixing it before contacting support in any way I could think, taking it on and off, playing around with different microtransactions, changing locations in-game, restarting the game, even updating my graphic card drivers, but nothing worked.

Let me know if anyone has fixed this sort of visual bug before, or if it's something that many people have experienced with Gloom Wings.