I'm unsure if this is the right place to post about it. Lemme know if it's not the case!

Date & Time: Whenever
Frequency: Everytime
World name: Cerberus / Chaos (certainly everywhere else as well)
Character name: Kharn Chinggis (certainly affects everyone else as well)

Concerned Item: Scion Traveler's Boots

Description:
As the two screenshots provided with the post show it, the plates on the knees of these boots literally disappear when taking the Gunbreaker's battle stance. It's like if they go "hide" inside the leg.