Drawn card disappearing in my hand (Not PvP)

[choongmyoung]

I was grinding AI3.
My deck was elemantal dragon OTK: All 6 SN needed.
I drawn SN, and when I tried to use SN immediatly, It just disappeared.

It's not the first time. I experienced this bug at least 5 times.
All was grinding AI3, with decks: elemental dragon OTK & mono death rush.
These are all after v1.29.

[ralouf]

Too lazy to search but it's a known bug called the fast draw, it happen when you play too quickly.