I have that one on my Valk too.
Noticed that when I quickly switch to default and then back it won’t appear the next match. But I don’t know for how long this will fix it.
My bf thinks it’s a Chaching Bug. Meaning the game tried to load the cache for the armor but it doesn’t wrong correctly for some reason.
Don’t know if verifying the game helps as well since it usually will override the Sava data on pc or ps with new information.