Okay so the EA Support Twitter account has switched from telling people to clear their caches, re-install Origin, power cycle their Xbox One and so on, to saying there are connectivity issues again, for example "is this on PS4? We're seeing connection and stats loading issues and the studio is investigating. We'll update you as soon as we hear more" was posted on Twitter 20 minutes ago.
Regarding stat loss they have just tweeted "thanks for reaching out. We are currently investigating this issue. Sorry for the inconvenience caused"
Multiple people cannot get in.
Mutliple people get in and have stats reset to 0.
Mutliple people get in, have normal stats, play one game and then when the game ends, assuming they can play a whole game, their stats reset to 0.
My advice, stop trying.
You're either going to fail to get in, or get in and find your stats are reset and have a panic attack, or have one game before you get kicked out.
The situation is obviously highly unstable still.
It's not a victory to get in after a dozen attempts, you're just getting in to an unstable server, that will probably kick you, return you to the home menu with reset stats and possibly not save any of the progress you made in that game anyway.
Will try to update this once I have a good amount of evidence that it's worth trying to play again.