Case 1:
A UV map from a previous used weapon (UMP 40) getting splashed onto the current weapon being held (Vector X) only being corrected once I died
Case 2:
Another player's skin (Carbine) being on my Vector X, same solution
for reference
my skin https://vvcap.com/1LnyoVeu9
another player's bugged skin https://vvcap.com/6XW6LVazj