[SECURITY VULNERABILITY] - Connecting to online services UNKNOWN ERROR

Lucked out with a support tech that would actually action something (instead of just deferring to unhelpful documentation) and have found a workaround that has rectified the authentication loop error [1:86001S:51009S:11468332130:1073807360Q].

What I recommend doing to rectify the issue quickly, without waiting for EA to pull their finger out. 

CONFIRMED WORK AROUND PROCESS:

1. Download your EA profile data
   1. This is required because you'll need to identify which 'Persona' or EA ID to preserve
2. Identify the EA ID which was used when you first played Battlefield 6
   1. I had a friend sit on the menu and watch as I launched the game through steam - the EA ID popped up saying "### is Online"
   2. THIS IS THE ID YOU NEED TO PRESERVE TO KEEP YOUR PROGRESS
3. Get a coffee, and start the long painful process of cycling through EA support techs until you find one willing to delete old EA ID's 
   1. Most will say they cant - just move on. Some of them CAN!
4. Delete ALL EA ID's except the one you identified in step 2
   1. This will align EA's backend authentication systems with the BF 6 authentication systems and you should be home free

NOTE: EA games which may be using alternate EA ID's/Persona's will lose their progress - proceed at your own discretion