Microsoft ipv6 blackhole for dns

I have an issue resolving some IPv6 addresses (i haven't ruled out my ISP just yet)
Specifically, strangely some microsoft addresses, (it's not my linux machine, I have the same issues on android over wireless etc.)

Anyway, to solve it I disable the IPv6 using a blackhole rule assigning 100:: to the AAAA record matching the regex .*\.microsoft\.com$.

On to my question:
I am troubled by the following regex and unexpected behaviour:

For some reason, when I blackhole the address azure-dns.com It doesn't match the rule to hole the AAAA address?
I don't see the address in the dns cache either, so I am completely flabbergasted as to how the value is there at all.

UPDATE: Did a firmware update and seems to be working now, :folded_hands:

Please mark topic as solved then.