Anyone else notice this

I am nearly positive this is NOT an Orbi issue but I thought I'd see if anyone else has noticed something similar. I have my Orbi connected behind my Uverse router (WiFi disabled, used only as a modem).  I have DirecTV hardwired to the Uverse modem and everything else goes through the Orbi.  Normal downloads speeds are in the 22-24 Mbps range, uploads are a whopping 2...<sarc>

 

If I do an upload of a large file [e.g., to my Google drive] downloads practically stop, both hardwired and WiFi (through the Orbi).   I first noticed it on WiFi so I thought I'd better rule out the Orbi as the source of the problem.

 

I ran two experiments yesterday to see if it was my Orbi or the Uverse modem.  I connected a laptop directly to the Uverse modem and my desktop was, of course,  hardwired to the Orbi.

 

First, I uploaded a large file from the laptop and checked the available download on the desktop (through the Orbi) - it dropped to under 2Mbps.

 

Second, I reversed the test and uploaded from the desktop (again through the Orbi) and checked download speed on the laptop - results were about the same, so I think that rules out the Orbi as the bottleneck. The Uverse modem is new and I'm sure AT&T will want me to reboot it before I do anything else so before I waste time talking to the know-nothings, I suppose I better try that first.

 

Anyone else see anything like this? I'm sure it's a Uverse issue but getting AT&T's attention is nearly impossible...