Tahm ult no description?

Hello,

I played Tahm today and noticed again, that his ult has no description for me. Even my friends have no description. I have this bug since i bought Tahm at his release but now i still have this bug. Can i do somthing to see it? (i know what the ult does, but for me there needs to be a description just for the look ^^)

mfg P4nkill3R