The ISPs are slow to answer if there is no active outage. Will take some time anyway.
Packets are dropped in bot directions. I am currently looking through the pcaps and will do another stress test later - got another window. MTU/MSS is the prio today.
Yeah, notifications are really unreliable here. I've got another window for more stress test today. Going to post update later, or tomorrow. Focus on MTU/MSS