When using the 'Spin Rush' skill as Fighter, their gloves disappear during the animation. This doesn't happen on live servers.
Here is a gif showcasing this:
https://i.gyazo.com/65f6f5c5ec101662fe40e10e6f9caa6f.mp4
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**EDIT**
It has come to my attention that this happens with all sub-weapon skills, not just 'Spin Rush'.
I tested it with the 'High Speed Needle' and 'Swiftness' as well as 'Storm Strike' - all three skills resulted in the disappearance of gloves. I did also test this on live servers, and no: my gloves do not disappear there. I also tested it with two different gloves, and they disappeared regardless of which I wore.
Here are three gif examples:
Swiftness - https://i.gyazo.com/3ee7d946d48cd813d0190529ddedec66.mp4
High Speed Needle - https://gyazo.com/8540c6154074a956eec56eb1467cedd1
Storm Strike - https://i.gyazo.com/7a71ffaf385f8ca640f8ac625266dac1.mp4