A method performed by a UE of a telecommunications system includes obtaining a first UE activity configuration and obtaining a second UE activity configuration. An activity and/or inactivity duration defined by the first UE activity configuration is different than an activity and/or inactivity duration defined by the second activity configuration. A transition is performed between the UE using the first UE activity configuration and the UE using the second UE activity configuration. The method further includes adapting one or more operations started or being performed under the first UE activity configuration being used just before the transition. The adapting is based on at least one of: the type of operation, activity and/or inactivity level of the first UE activity configuration and/or of the second UE activity configuration, and a relation between the first UE activity configuration and the second UE activity configuration.