I had a similar issue with unusual latency spikes. Something changed in OW2’s netcode that didn’t agree with my ISPs implementation of IPv6. I disabled IPv6 on my router and desktop and the issue was resolved (now using IPv4 only instead of both).
I’m not a network engineer so I can’t diagnose the root cause, but the results are all that matters to me. Its an easy enough change to test and revert in the event it doesn’t make any improvements for you.
My original issue post: Rubberbanding/Lag Issue Replication & Detailed Steps
My update post: [Solution/Workaround] Rubberbanding/Latency Spikes / Comcast