It’s hard to say that @Kringloper’s issue is the same like yours, because he didn’t showed the Insights of the energy consumption.
But I recognized the same issue like you also with Z-Wave devices some days ago:
(Fibaro Double Switch FGS-223, Firmware v3.3, Homey Fibaro App v3.8.0)
(Aeotec Smart Switch 7 ZW175, Firmware v1.3, Homey Aeotec App v.3.14.3)
Homey Pro (early 2023), Firmware v12.3.0-rc.10.
@Harwin, @Doekse, @bouke, @Robin, I don’t know who is the right person, sorry for that, but could someone please have a look at this? For me it looks like that there are (still) problems with the Z-Wave integration.
Homey Diagnostics Report ID: 4D8BC985
Fibaro App Diagnostics Report ID: 44d8a92f-676e-4906-af88-8397c7a0aca9