Hello @iodream, I expect that you were testing games using Proton. This issue is already being tracked at https://github.com/ValveSoftware/Proton/issues/6280. Closing as a duplicate.
If you see this happening with a native linux game, then that is worth pondering separately.
Yes that's correct. Sorry i didn't catch the duplicate.
Your system information
Please describe your issue in as much detail as possible:
Whenever i open either a chat window or any other window like the discussions in the in-game overlay if i want to type any letter i have to press it twice. Like if i want to type 's' i have to press the s key twice. This issue does NOT happen in a regular steam chat window outside the overlay.
This issue is also most likely not caused by the new update as it was already present before it.
Steps for reproducing this issue: