I just thought so, because you were asking for this specific value. 
From my understanding this specific value is counting something but I don't know what. So it cannot be zero if that what it is counting is working. But we need to know what it is counting to produce the counts.
EDIT: There is a discussion about ecm within this thread ~ post count 2011. I'm not in the mute to read into it. ... and ofc this thread: Ipq806x NSS build (Netgear R7800 / TP-Link C2600 / Linksys EA8500)