Core 1.0.0 breaking SG tray app

Hey! Currently testing out Core 1.0.0, and the SG tray app has disappeared :frowning:

Using launcher 1.1.0 and SG 0.4.5, although older SG addons suffer the same fate
No errors seem to be logged in the console, even when launched with --debug.
And, the SG addon itself does seem to load

Anyone got tips on debugging this?