Upload slows down when clicking on WiFi icon using option button on a keyboard.

[63W]

I have a 2014 MacBook Air.

I have installed Ventura and Sonoma using OpenCore Legacy Patcher 2.2.0 and everything works great. But when I'm uploading a file/s, either to google drive or to my local NAS, and click on WiFI icon and option on keyboard to see more information about WiFi, the upload drops to 5MB/s. Then it goes full speed and 2 seconds later it drops again to 5MB/s. Once I close the wifi menu, speeds are back to normal. This is on fresh install on Ventura and Sonoma. Furthermore, the wifi link drops from 867Mbps to around 502Mbps.

I have tried 6 different wifi routers at this point and the issue is not with wifi routers. 2 - Asus routers that are Wifi 5. 1 - Asus router that is that is Wifi 6. 3 - Glinet Wifi 6 routers.

I honestly don't recall if this was an issue when I was using macOS Big Sur that natively supports my 2014 MacBook Air. Over all everything works great, but this little thing just bugs me and I need to figure it out so I can cross it of my to do list.

If anyone has any suggestions where I should start looking or has a solution, that would great.

 

[arw]

I upgraded my MacBook Air 2012 to the same WiFi module the 2014 model uses (BCM94360CS2).
I run Big Sur unpatched with its native WiFi drivers. (I simply skipped the compatibility check of macOS with: nvram boot-args="-no_compat_check")
I can reproduce exactly what you describe.
I can only imagine scanning the environment or getting more details about the connection comes at the expense of actual data throughput.
In the graph below I probably don't have to mark where I option-clicked the WiFi icon:

 

[63W]

I upgraded my MacBook Air 2012 to the same WiFi module the 2014 model uses (BCM94360CS2).
I run Big Sur unpatched with its native WiFi drivers. (I simply skipped the compatibility check of macOS with: nvram boot-args="-no_compat_check")
I can reproduce exactly what you describe.
I can only imagine scanning the environment or getting more details about the connection comes at the expense of actual data throughput.
In the graph below I probably don't have to mark where I option-clicked the WiFi icon:
View attachment 2473625

That makes sense. I guess it is what is. Cheers.