I was trying to change the controller settings while in a game. Changing the controls themselves works fine, but the names default to shooter game controls so I tried to rename them, but the R, T, and O keys do not work. The O key does nothing, R acts as the right arrow, and T acts as the down arrow. This happens whether I use my physical keyboard, or use the mouse or controller for the onscreen keyboard.

## To reproduce
* open a game that doesn't natively support a controller (e.g. Cosmic Express 583270, Gridroad 2677310)
* press Shift+Tab to open Steam Overlay
* open Controller Settings
* Edit Layout
* open settings on a control (e.g. the B button of the xbox controller)
* press Rename command
* type something including O, R, or T and observe the above behavior

I observed this behavior on the following systems:

Debian Bookworm

Operating System Version:
Debian GNU/Linux 12 (bookworm) (64 bit)
Kernel Name: Linux
Kernel Version: 6.1.0-34-amd64
X Server Vendor: The X.Org Foundation
X Server Release: 12101007
X Window Manager: KWin
Steam Runtime Version: steam-runtime_1.0.20250307.120442
Client Information:
Version: 1745876290

Debian Trixie

Operating System Version:
Debian GNU/Linux 13 (trixie) (64 bit)
Kernel Version: 6.12.27-amd64
X Server Vendor: The X.Org Foundation
X Server Release: 12101016
X Window Manager: KWin
Steam Runtime Version: steam-runtime_1.0.20250408.124523
Client Information:
Version: 1747701111

## workaround
View controller settings from outside the game e.g. the library page in the steam app. As far as I can tell this properly updates the setting even if the game is open.