A new Steam client has been released and will be automatically downloaded.
Steam Input- Fixed XINPUT_KEYSTROKE input for Steam Input controllers
 Fixed an issue where Victrix Pro Fight Sticks could lose input after rebooting the PC
 
Linux- Fixed downloads failing on some systems due to max open file descriptors too low
 
SteamNetworkingSockets- Fixed a bug with long-running clients such as dedicated servers having P2P connectivity problems due to using an expired certificate
 
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