Controllers may stop working during gameplay. Valve has already addressed the issue.
Reviewers are receiving Steam Machine units, and early tests reveal several bugs. The device relies on a version of SteamOS originally built for the Steam Deck.
The operating system contains various directories and system files referencing the Steam Deck. These remnants cause practical issues for players. Some games misidentify the Steam Machine as a Steam Deck upon launch and apply settings optimized for the handheld device.
For instance, Kingdom Come: Deliverance 2 disables mouse and keyboard support at startup due to this misidentification.
Valve released a specific game setting to disable the automatic Steam Deck detection. This fix prevents compatibility conflicts in affected titles.
Valve wants to evolve SteamOS into a universal platform for different hardware. However, this situation highlights that the current build still relies heavily on features designed for the Steam Deck.
Source: iXBT.games