See it happen in the character selection screen. if you select a taunt or skin that isn’t your default selection and you change tabs it resets back to the default. the skin one happens rarely but the taunt one is frequent.
The mouse_over is messing me up, if you accidentally move over a taunt it selects it for the match.
Oh must be across all platforms then, I’m on Xone
Happens here on PS4 too.