[synthesis5x]

Hey man. I agree, this issue has been going on for nearly six months, and they’ve been closing my tickets—it’s honestly a joke at this point. Back in 2023, the exact same thing happened, and I had to resort to social engineering just to get them to find the problem; they fixed it a day later. I’m not proud of doing that, but I have to emphasize it because Meta has built performance dashboards designed to delude themselves.

Packet loss is happening all the time, though it might be more noticeable during peak hours since a faulty interface will show a higher error rate under heavy load. You can replicate it using looking glasses; maybe you didn't see it five days ago but you do now. Since it’s an ECMP issue, it depends heavily on which source and destination servers you’re testing. It’s just a matter of iterating.

I’m glad you were able to replicate it on ping.pe; Meta, however, still has no clue