Cannot start stream when OS turns screen off

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I'm running Sunshine on Garuda Linux and when the OS turns the screen off after being idle for some time, Moonlight can no longer start a stream to the Sunshine server. It pops up an error saying Failed to initialize video capture/encoding. Is a display connected and turned on?

The only way to get it working again is to physically go to the machine and wiggle the mouse or something to wake up the display. This seems to be unrelated to whether I turn the display on or off with its power button. The machine itself is not asleep -- Moonlight can connect to the Sunshine server and display the list of apps, but simply cannot start any of them.

I used to run Sunshine on Windows 10, on the same machine, and I don't recall having the same problem. Is there something different about the way Linux turns off the screen? Is there something I can adjust in Sunshine's configuration to avoid this issue?