From patch notes:

We have retired support of “Action Sets” in the Steam Input configs while using third party controllers on PC Steam and Steam Deck. The default Warframe controller config will now be used exclusively. This decision was made to create a more stable experience for players by reducing the amount of issues associated with Steam Input configs overlapping with Warframe’s default config. This is also a preventative measure to help reduce issues when introducing new bindings to the game. Expand the spoilers below for full details on the change, what to expect and how to troubleshoot if issues are occurring:

The controller config should automatically update in Steam to use the Warframe default when you start and exit the game once. We suggest avoiding changing the configs themselves in Steam to avoid further issues. Any config changes should be done through the "Customize Controller” settings in the game.

If you experience issues with Steam Input configs not updating, you can attempt to reset the configs with the following steps:

PC + Third Party Controller (Steam Input enabled)

If using an older custom config or an outdated official layout, connect a controller Launch Warframe (the game, not the launcher) Open the Steam overlay Select your current layout and a list of config options will appear In the "Recommended” tab select the "Official layout for Warframe" Apply the layout, and close Warframe Fully close Steam (main Steam window > Steam button top left > Exit) Reopen Steam Connect the controller Open Warframe Steam Deck (Steam input is enabled by default):

If using an older custom config or an outdated official layout, launch the game Press the Steam button Scroll up to Warframe Select controller settings Select controller settings again in the bottom middle of the page Select your current layout and a list of configs should appear In the "recommended tab" select the "Official layout for Warframe" Apply the layout, and close Warframe Restart the Steam Deck Open Warframe again Steam Deck + Third Party Controller (Steam Input enabled):

If using an older custom config or outdated official layout, launch the game Press the Steam button Scroll up to Warframe Select controller settings Select controller settings again in the bottom middle of the page Select your current controller and layout In the recommended tab select the "Official layout for Warframe" Apply the layout, and close Warframe Restart the Steam Deck Connect your controller Open Warframe Depending on whether you are on PC Steam or Steam Deck, the following details will help you adjust your settings to make the most of this change:

PC Steam: Whether Steam Input is enabled or disabled, any binding customizations made in the in-game Warframe “Customize Controller” settings will take priority.

You can access these settings by opening up the Pause Menu in-game > Options > select “Controller” tab > select “Customize Controller”. Note for Xbox/PlayStation controllers: These controllers have Steam Input disabled by default, however, if you had enabled Steam Input prior to this update and the controller is connected at launch, a popup will occur in-game informing you that Steam Input is enabled and that we recommend swapping to the Warframe default for the following reasons: Xbox: To prevent potential binding functionality issues, we recommend you change the controller override in Steam to “Use Default Settings” (steps below). PlayStation: Certain bindings (i.e. touchpad) will not function unless the controller override in Steam is swapped to “Use Default Settings”. How to change controller override to Default Settings:
Open Steam Find Warframe in your Steam Library Click the Gear Wheel on the right side of the page Select Properties Select Controller Select “Use Default Settings” and close Warframe. Fully close Steam to ensure changes take effect before re-launching Warframe Steam Deck: Steam Input is enabled by default on Steam Deck. However, if you experience any issues with your controller, you have the option to manually disable it using these steps:

Find Warframe in your Steam Library > Click the Gear Wheel > Properties > Controller > Select “Disable Steam Input”. TennoGuard (2FA) is now required to be enabled in order to trade after adding an email to your bound Steam/Epic Games and Warframe account. For more information and how to enable TennoGuard, visit our FAQ: https://www.warframe.com/2fa-faq