Installation of XCP-NG 8.3 works fine on our HP Proliant DL380 Gen 9, but then randomly after some days the host just freeze. I have reinstalled it several times.
Its booting to UEFI. Earlier it has been running XenServer 8.1 (booting to Bios) and it never had any problems.
I ran all the hardware diagnostics for weeks and no problems found.

Should I switch back to BIOS or is there any other things I could have missed?

Have I understood this correct when I think that:
XCP-NG 8.2 is same "source" as Citrix Hypervisor 8.2?
XCP-NG 8.3 is same "source" as the XenServer 8.0?