An update to my problems mentioned above, I am now home testing the static IP 2Deg support assigned. And the problems appear to be resolved. Therefore there was a problem with CGNAT affecting my connectivity to, PUBG, AOE2 DE, and twitch chat (which did work but was continually reconnecting every 30 sec)
Thank you 2Deg for prompt assistance, the support representative Matt was very good on the phone. Wait time around 15min, and call about 5min to solve. Wait not unreasonable given others may also be affected.
That really sounds like the scnat rule is timing out. For all of those things a public ip isn't required or even really used at all
Yes I agree
Thankfully Geekzone to the rescue as a place for users to share common problems, I was eventually beginning to conclude the issue wasn't on my end, but seeing others experiencing issues of same nature helped avoid some further loss of hair ;)