A method for wireless communication by a UE includes receiving, from a base station, DCI indicating both a semi-persistent schedule for PDSCH occasions within a transmission window and a first quantity of a first group of empty PDSCH occasions. The PDSCH occasions may include the first group of empty PDSCH occasions and a second group of non-empty PDSCH occasions. The method also includes receiving, from the base station, downlink data transmissions within the transmission window based on the semi-persistent schedule. The method further includes transmitting, to the base station, a feedback message indicating a second quantity of either a first group of NACKs associated with the first group of empty PDSCH occasions or a second group of NACKs associated with the second group of non-empty PDSCH occasions based on a total quantity of both the first group of NACKs and the second group of NACKs being greater than the first quantity.