I think I have the same issue: I had abnormally high consumption readings on January 5 for most of my devices reported in Z2M (Zigbee2MQTT), while I have nothing unusual on the Enedis reporting. And in fact this happened when I tried to update the devices in the Zigbee integration (and the update failed, which is what is described on https://community.gladysassistant.com/t/probleme-maj-appareil-z2m/9898).
I haven’t had time to look in detail yet, but here are some examples:
