As IPv6 continues to give issues, we are hereby reloading router 2 to apply new settings to combat the ongoing issues of IPv6.

We will make sure that the traffic falls back on R1 before the reload.

Update 9:21:
As the router R2 is back in production, we also will be reloading R1 to bring these settings in effect.

Update 10:18:
Both routers are reloaded with new settings and confirmed that the issue is resolved.