It must be new as there was a big fuss. I have been down 5 times in last 2 weeks and this is the only time.

Gate 3, they sent everyone except group 1 down the usual lane next to the window but sent group 1 down the inside lane.

Then they boarded the non priority lane. Then they couldn't wedge the priority door open and so it had to be held.

No signs though but definitely seemed to be a thing!