I have the same problem. I have 2 innr plugs on the ground level, working just fine. Powermetering and flows are working perfect.
On the other hand: I have a SP120 in the cellar for controlling my washing machine. Every time I start the washing machine, after a few minutes, the plug puts itself in red (off). Not sure what it is, but pretty annoying. I have the idea that when there’s too much wattage (2130W), it shuts off… any ideas ?