The reason that I didn't send in a ticket is because it seems to be a rampant issue over the past 2 years. If the devs knew how to fix it, this wouldn't be a problem in the first place.
give me a ticket number plz
You get a backend error with a bunch of gibberish in the text box? It is because Comcast is trying to inject their warning message that you've used X% of your monthly data. I get the same issue, but all you have to do is go to any website you normally browse and click around on a bunch of links until the message pops up. Then go back into Tarkov and try to log in again. It has happened to me 5 times this month as I reached my 1TB limit, but after clearing the message in chrome it has always allowed me to log in to the game. Hope it helps.
Edit: Here is the thread I found to help when I had the original issue - here
yes. that what we discovered too some time ago
devtrackers.gg