Hi!

First of all my setup:
HASS Core: 2025.3.3
HASS Supervisor: 2025.3.3
ZHA Version: whatever ships with above^
Dongle: Sonoff ZigBee 3.0 Dongle Plus E (which HASS says runs firmware 7.4.2.0)

The problem description:
I have gotten 2 batches of IKEA INSPELNING smart plugs at different moments in time.

The first batch of three shipped with early firmware (with the power measurement bug) and have gotten updated to the latest version (0x02040045). These seem to function okay and update every 5 seconds.

I have now gotten another batch of 4 INSPELNINGs that shipped with firmware 0x02040045 and do not have the same reporting frequency. I am not sure what triggers a new report, but it seems to only change on big changes in power. I've had it stick to 244W for at least half an hour too long until it finally got a new report that it dropped to 18.5W. I have a different setup with a Pi and a Deconz stick that, I'm pretty sure, displays the same behaviour. Same batch of INSPELNING aswell.

I have noticed that using the "Manage zigbee device" function in HASS to read "active_power" attribute under "ElectricalMeasurement" will update the value that's displayed in HASS so I'm assuming there's something going on with polling from ZHA or reporting from the device itself.

Please let me know if you need more info. I will try my best to get it, but may need some pointers to where.