UPDATE (May 12, 2023)
Issue seems to be fixed as of the May 12, 2023 beta client patch

==========================
ORIGINAL POST
==========================
ISSUE
The vibration on my Steam Controller is not working correctly after the May 9th patch. Any vibration in the game is far stronger than it is supposed to be and lasts several seconds more than it should. I've tested this with several games and every time the controller is supposed to vibrate due to a game action, I get the issue. I have updated to the latest beta client patch that came out on May 10th but I still have the issue. Reverting back to the Steam stable client resolves the issue.

OS
Windows 10

STEPS

• Start a game with your Steam Controller turned on and vibration enabled
  
• Perform an in-game action that activates controller rumble (for example, shoot a gun in an FPS or take damage)

RESULTS
The strength of the controller vibration exceeds what it is supposed to be. The amount of vibration time is longer than what it normally should be. For example, if you fire a gun in an FPS the vibration is a lot stronger and lasts 2 or 3 seconds.

EXPECTED
The controller vibrates normally

NOTES

• I noticed this problem after the May 9th patch. I have updated the Steam Client Beta to the latest patch (May 10th) and the problem is still happening
  
• This happens in both Desktop Mode and Big Picture Mode
  
• I have not tested this out with any other controller, so I'm not sure if it's just Steam Controllers or any Steam-compatible controller (PS5, Xbox, Switch, etc.). I also don't have a Steam Deck so I can't say if that device is being affected as well.
  
• Reverting back to the stable Steam client resolves the issue; I only have the vibration problem with the Steam Beta client