An apparatus may be configured to obtain a grant allocating a set of resources on which to transmit at least two transport blocks (TBs) using multiple spatial layers; determine whether a data size of data available to be carried on the set resources is sufficient for at least one TB of the at least two TBs; and based on a determination of whether the data size of the data is sufficient for the at least one TB of the at least two TBs, one of: transmit, to a network entity, the at least one TB of the at least two TBs on the set of resources allocated by the grant, or skip the grant.