jetbrains-gateway URL handler only works if Gateway is already running

I'm finding it a bit annoying that I need to launch Gateway before clicking the "Open IDE" shortcut from Space Desktop. If I do not so so, then the URL does not open, even after clicking "Open Gateway" in the browser that pops up. If I copy the jetbrains-gateway:// URL from the developer console, and run `xdg-open <url>` (with Gateway closed), the application opens as expected. Does anyone have any ideas why it won't work unless Gateway is already running?