Hello!!!
It's been over a year since this was first reported and it's still happening!
I bought my SB about 10 days ago, everything was fine until I got my external monitors set up.
I assumed I had a defective laptop, so I exchanged it for a new one. Same issue.
I even got a new modem (Netgear CM300) and a new router (TP-Link AC1900) just in case that was the issue.
Nope!
So if I want to use my home office setup, I have to keep the lid ajar.
For a laptop costing nearly $3,000, I find this unacceptable!
Microsoft? Are you listening?