December 2017
I'm on PS4, and the exact same issue arose when Glitch in the Frontier was released. A later patch resolved it for a few months, but now the December 2017 patch has caused it to return.
Nothing has changed on my local network during this time, and all my other games work fine. This seems to be something very specific to Titanfall 2's netcode or servers.
I'm in the UK, my ping is around 25ms and my ISP (XLN Telecom) does not throttle data, ever. It can't be coincidence that these problems always manifest/resolve on the same days that patches are deployed!
January 2018