Confirmed in 2.8.6-4ubuntu2, and also on the Windows Version of Xchat, 2.8.7f. It seems that adding a channel to favourites does not write the channel name into the servlist_.conf, as adding it in the Network list does.
Confirmed in 2.8.6-4ubuntu2, and also on the Windows Version of Xchat, 2.8.7f. It seems that adding a channel to favourites does not write the channel name into the servlist_.conf, as adding it in the Network list does.