NETGEAR - Orbi 750 Series AX4200 Tri-Band Mesh Wi-Fi 6 Satellite; Latest Firmware Update v7.2.6.31

Update 6/1/2024

Ordered 2 RBS750 'new' satellites from Ebay, received in mail this date.  (They were 'new' as the satellites had been part of a package, and the package was broken down into saleable individual items, and not used.)

Added the satellites to the router using the Orbi app, no issues connecting, ran firmware update and router and satellites are all updated to the most up-to-date version, but did have to go into the Orbi app on my PC to delete the old RBS350 satellites that I had removed from my setup.

Checked all connectivity, everything looks good.  However, when running an Internet Speed through the Orbi app on my iPhone (which actually runs the Speedtest directly through the router, and not a satellite), I found that the UPLOAD speed was only showing a speed of around 3.42 MBPS (DOWNLOAD speed was fine, around 930.12 MBPS).  I then ran a Speed test through Orbi on my PC, and it showed an UPLOAD speed of 3.64 MBPS (again, DOWNLOAD was okay as well, around 961.13).

For comparison, I then ran a Speedtest on my PC, and my results were a DOWNLOAD speed of 897.55 MBPS and an UPLOAD speed of 942.86 MBPS.

Any ideas on the difference between the tests for the upload speeds?  I believe I had seen this on one occasion previously with the Orbi app, but it resolved itself within a couple of hours.  Might this be a glitch with both the Orbi iOS app and through the orbilogin website?

FYI, I am on Spectrum Fiber Optic internet.  Tests results with the RBR750 and older RBS350s from 5/30/2024 using the Internet Speed function in the Orbi app on iPhone were DOWNLOAD speed of 946.58 MBPS and 951.76 MBPS.

Ideas on what might be causing this discrepancy, possible solutions?

Thanks in advance!!!