serpent sting upgrade bug

Hi, I hope you are doing well. I use the Serpent sting heirloom without the visual upgrade (because I prefer the sober visual) but since the start of the season the upgrade shows up even tho I didn't even unlocked it. I don't know if others heirloom are glitched too but I really like my unevolved serpent sting and it kinda ruin the game experience for me with the visual clutter of the upgrade so I have to play without my heirloom even tho the grind was so hard for obtaining it... I hope it will be fixed soon but in any case I wish you a great day !