Really wierd sticky key bug or some ♥♥♥♥ when I type to friends

[Gameoholic]

Basicly, whenever i play Super House of Dead Ninjas and whant to type to a friend on steam my keys are going crazy. To be more specific, I press for exampel "A" but instead of one A I get like 5 or hell mabye even 10 "A"s. i tired seing if it had to do with my my pc or steam by playin a diferent game. everything worked fine. Anyone got any ides?

[Devil’s Doorbell]

It does this to me too. Also does it if you try to use Steam browser. Just 1 letter constantly, you can't even take Steam overlay back down without closing the game. I had to do it earlier and I lost all my unlocks. Not a huge deal losing my save but the fact it happens is a bit bad.

[Toxic Ghost]

I have had that too (the part of geting more then one letter)