Squeezebox favorites

is it correct that the “playFavorite” channel is not updated when i change to another favorite direct on lms (and not from openhab)?

i have serverchannel “favoritesList” working and updated on every change:
grafik

the player-channes are ok except the playFavorite, this stays NULL as long as i do not send any command from openhab side:
grafik

background is that i don´t use habpanel, only the openhab-app. to be able to choose a favorite i added a webview of lms to the sitemap.

to enable the possibillity of a fast change of the favorites (from an external switch) i need to know the actual favorite number to be able to:
playfavorite.sendcommand(actualfavorite + 1)

another question: is there a way to find out how many favorites exist?

would be glad about help, thanks