Ubuntu is Debian based.
I have the same issue on Ubuntu.
This issue is not about distro flavour. Arch users also have the same issue Linux vesion of Lunacy is buggy - #10 by everyx
And openSUSE affected
Lunacy takes VERY long to start because of the fonts
03:19:05.066 Launcher Default > Launch args: /opt/icons8/lunacy/Lunacy.dll
03:19:05.070 Settings Default > DeviceId: f067e69d-ff13-4602-bf5f-657e5398260e
03:19:05.133 Account Done > Already authorized to EU_Prod. Refreshing
03:19:05.147 Api Default > Connection restoring: EU_Prod
03:19:05.159 Api Default > Main Connection is: EU_Prod
03:19:05.520 Push EU_Prod Info > Connecting
03:19:05.724 SystemFonts Done > System fonts cache loaded: 14872 font families
03:19:06.226 Push EU_Prod Info > Initializing
03:19:06.243 Push EU_Prod Done > Connected
03:19:06.750 Push EU_Prod Error > Disconnected
03:19:06.771 Account Done > Authorized to EU_Prod
03:19:06.782 Push EU_Prod Info > Connecting
03:19:07.152 Push EU_Prod Info > Initializing
03:19:07.153 Push EU_Prod Done > Connected
03:19:13.440 UpdateChecker Default > Remote version: 9.1.1
03:24:20.024 Render Info > Running a GC and GL cleanup on 20sec of AFK (once in 5min)
App hangs on start with high CPU load.
And i don’t have 14872 font families installed…