I recently got the XE70 Pro. Less than 24 hours in, I noticed the upload speed is a third of what is expected.

I have 300/300 Fios; when I use the FiOS router, I get full speed in both upload and download. I get full speed down when using the Deco, but the upload is about half or less. I tried different servers and even turned back on the Fios Wifi to compare. I ensured that the cable was the one that came with the Deco; I also used a Cat 5e and Cat six cable to make sure. The port on the router is 1Gb; I doubt that the Fios router is throttling because I have a switch connected, and the computer is getting full bandwidth. 

I started looking at threads and realized this is a common issue with Deco. Since these were posted some years ago, I assumed it was fixed.

Should I return, or is there a fix?