Embodiments include methods for a master node (MN) configured to provide a master cell group (MCG) in dual connectivity (DC) with a user equipment (UE) together with a secondary node (SN) configured to provide a secondary cell group (SCG). Such methods include determining one or more restriction parameters to control selection of the UE's SCG configuration by the SN, such that the UE's minimum required processing time, T_SCG, of SN messages scheduling UE uplink (UL) SCG transmissions is smaller than a maximum value derived from the one or more restriction parameters. Such methods include sending, to the SN, at least portion of the determined restriction parameters. Other embodiments include complementary methods for an SN, as well as network nodes configured to perform such methods.