Everything is working fine on 6.3.3 version, I hit upgrade, and reboot.
I have two raid arrays:
500 + 500 NVME = raid 1 software
4tb + 4tb = raid 1 software
md5 which held 2 x 4tb in it has completely vainshed and the seperate disks are ready to initialize!
my md5 array was mounted on...