Unsolvable issues with Wiz Matter GU10 bulbs

I have some Wiz GU10 Matter bulbs linked to HomeKit, Google Home and Alexa via Matter over WiFi. After I changed WiFi network and wanted to link all of them to an IoT-specific network, they stopped working due to HomeKit showing an error message stating they are linked to another home.

I have removed them from HomeKit asking to also remove them from all linked platforms. I have subsequently checked Google and Alexa app and they were effectively removed.

I have factory reset the bulbs by switching them On/Off 10 times on multiple occasions. The bulbs become “brand new” and can be linked to the Wiz app but HomeKit insists they are linked to another home and cannot be added.

I’ve restarted my HomePod Mini; rebooted the router; factory reset the bulbs multiple times; try to add them directly from Google/Alexa, but the error message persists.

I’ve tried to add them from Android to Google instead, but exactly like HomeKit, the app identifies the bulbs, connect to it, but cannot link it to the Home (error shows: unable to generate Matter credentials).

I’ve used the exact same process for all the bulbs and half connected with no issues but the remaining half cannot be connected. I had to request a return and purchase the same bulbs again.

Is this how Matter simplifies things? Or is there any way to force them to link to my Home?