TxAck parsing handling error

I have started seeing this message, and am not sure what it means. Is this the case if multiple downlink items are sent in a single “down” publish? I didn’t realize this could occur, if so.

level=error msg=“uplink: handle downlink tx ack error” ctx_id=f0265f27-335b-4a81-8566-a3537ec7af90 error=“length of ack items is not equal to length of downlink items”

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I tracked this down to the following setting:
multi_downlink_feature = “legacy”

When changed to “multi_only”, the problem goes away and the end device stops getting multiple dupe packets (new feature of keeping packet in the queue if txack fails)