Vibrating/shuddering melee in Arsenal

[(PSN)GrandisSupernus]

When turning the character (any Warframe) in the Arsenal with any type of melee weapon equipped, the character and the weapon they're holding will quickly jerk or vibrate up and down. It's a really ugly effect. It seems to be most visible on the Magistar (or at least the Sancti Magistar; I don't predict a difference between them in this case). If you have Constant Weapon Trail equipped and spin the Warframe at a medium pace, you can see the trail become almost jagged with the sudden up-and-down movement.

It seems to "reset" (that is, return to its most obviously vibrating state) every few minutes. I can't tell why. I've had the bug pop up with every Warframe I've tried regardless as to what Animation Set they were using at the time, including Default.

UPDATE! This only occurs when spinning the character to the right, for some reason.

 

Spoiler

https://i.imgur.com/ryUchGf.jpg
https://i.imgur.com/q0sBuMC.jpg