I did the update last week and just noticed that tvheadeand does not work anymore.
I could acces the webinterface until i updated the tvheadend service to 12.1.
When I could still access it, the DVB Adapter was missing (digibit twin), but its still there under its IP Address.
did I miss something?
EDIT:
found it i think,the option wait for client was checked, after unchecking the server started.