I have a half dozen of these working without any problems on my C-8 hub.
The key is to pair them via a repeater/router, never directly to the hub.
Remove the battery for a few minutes, then before reinserting the battery back, start the Zigbee pairing in the normal mode.
Pair the sensor again, very close to a mains powered Zigbee device nearby - a zigbee plug as an example. Keep it extremely close,’even touching the zigbee repeater.
If (when it pairs) check the zigbee map - does it show direct connection or via the repeater if your choice? If needed, repeat the same pairing procedure several times, until you see in the map that the older generation Aqara sensor is paired via the repeater.
These old Aqara sensors are ‘sticky’ - once paired via repeater, they will stay connected this way.