We had a Problem with the WebUi and the visibility of devices attributed to a certain contactgroup.
It seems that if the admin responsible for a group of hosts (i.e. is registered under etc/conf.d/contactgroups.cfg) is not present in the WebUi passwd file the whole set of devices that he would get the notifications for doesn't show up in the WebUi.
The count of devices for that group is still shown if you use the filter-function but there is no output.
Not sure if this is the kind of behavior you want for such a situation.
With the best regards
IWR - Uni Heidelberg