The option "Start minimized to tray" no longer works on Thunderbird 60.6.1 (W10)

[kidspartan]

But all other functionalities work normally.

[zingmars]

I can confirm this with Thunderbird 60.8.0 on Windows 10 v1903 (18362.239). Most of the time after starting Thunderbird won't be hidden to tray. Sometimes it will be, but it will still show up in alt+tab menu, but it can't be switched to (to fix this one needs to re-open and hide Thunderbird again).