I had a similar seeming problem, but was able to get it resolved by clicking "configure" on the offending devices. I had reached out to Zooz support about possible firmware upgrades and they were great and didn't even make me feel dumb when I fixed my own problem with "configure"
Once that configure was committed by the devices that were being excessively chatty, the repeated notifications stopped.
Also fine tune the reporting options, I have some fish tank heaters on outlets that use 50w, so I changed the reporting threshold to 20w, so smaller changes in power don't get reported. I also changed it to 10m reporting frequency and turned down the energy reporting frequency (24 hours for now, but might lower it once I get influxDB setup).
On the Zooz Power switch you can also change "power report percentage change" which can trigger LOTS of reporting at small load changes if the total load is small (10% of 10w is 1w change in power).