Which app do you mean ?
Can you share also view from Homey Developer Tools ?
Also I guess you performed already PTP (pull the plug), have you are tried to disconnect power from all repeaters, eg. using surge protection?
Note there has been cases about Ikea devices causing Zigbee being slow - please try to search on forum.
Last but not least, when those issues started ?
None of the repeaters are being switched off, right ? (eg. Zigbee Ikea bulb is always turned off only via Homey never via switch).
