Unable to add Homekit Accessory

I am unable to add accessory in Home app in iOS. I have trying clearing the bindinds, deleting the config files of homekit and rebooting both openHAB and my iPhone (as mentioned here HomeKit Add-on - System Integrations | openHAB). But it still says Accessory is not reachable. The openhab homekit addon is visible in the Home app while trying to add accessory by itself but does not pair. I think it maybe because of some update from Apple side in the pin required to pair the accessory as when entering the pin on openHAB front end there are 2 dashes/hyphens (-) and when entering the same 10 digits pin on Home app while pairing, there is only one dash/hyphen. Is there any way I can debug this and make it work somehow? My openHAB is 5.0.0

The correct format is xxx-xx-xxx