RT-AC86U LAN at 1/2 speed of wireless

I'm new here, so I'll apologize up front if I've posted this in the wrong section.

My ISP did a free upgrade from 150 to 300. I've been using an AC-66U, I thought the speed upgrade was a good excuse to upgrade my router to an 86U. It is impressive with 5G coverage in my house btw.

I installed the new Merlin firmware 384.8. I've read a ton of threads on settings. 5G on my phone is very close to 300.

WAN and LAN are both showing 1 gig.

But my hard wired PC will not get over 150.

I did...

RT-AC86U LAN at 1/2 speed of wireless