A sequence of read returns are to be sent to a host device over a transactional buffered memory interface, where the sequence includes at least a first read return to a first read request and a second read return to a second read request. A tracker identifier of the second read return is encoded in the first read return and the first read return is sent with the tracker identifier of the second read return to the host device. The second read return is sent to the host device after the first read return is sent.