Hi,
Since today I have a weird behavior with Steam Beta,
I didn't see a new update so not sure what triggered it, but it's only on Beta (when switching out the bug resolves itself), when switching back into Beta crashes start again.

The bug is as follow:
Some game and actions outright crashes Steam when using an XBox layout controller.
Starting some specific game consistently crashes Steam (Elden Ring Nightreign) a few seconds after clicking the "Play" button or the shortcut, even before the game process starts.
steamerrorreporter.exe is successfully executed upon the crash.
It also happens every time when checking the file integrity of the game, it crashes when getting near 100%.
I also had a few random crashes after using the UI, but they are more infrequent an inconsistent, while the game crash is 100%, for example when right clicking the game in the library.

Unplugging/Disconnecting the controller prevent crashes.
Pluging/Connecting the controller when the game is running will freez the game and Crash Stream.
Disabling Steam Input for Xbox doesn't solve the issue.
Disabling Guide Button doesn't solve the issue.
All other options are disabled.

The game itself works fine when out of beta.

It doesn't happen with every games (Tested Dune, He Is Coming and Project Zomboid, they are fine).

I'm using a FlyDigi Apex 4 Elite wired detected as an XBox Controller.
Same issue when using Wireless (Bluetooth XInput)

Windows 11 Pro Fully up to date.
Tested on Driver NVidia v546.80 and 576.88 (Up to date)
Tried rebooting.
Tried moving the game to an other drive or freeing space, same result.