Very SLOW upload Speed when Display OFF- Mac Sonoma 14.6.1- Macbook Pro M3 2024

Having a issue with my brand new Macbook Pro M3 Sonoma 14.6, Wifi UPLOADING speed is too slow when the display is off. The unit bought just 2 weeks back. This a known issue lots if message and posts online but no solution from apple. Will be returning the macbook if not solved.

When i upload a data to google drive it show 3hrs etc , as soon as the display, time start increasing to 100+ hours just for 6GB of Data. Tried on my older Macbooks and no such issue , same data uploads in less than 3hrs.

Tried below settings on M3 to solve but still issue persist.

NOTE: Issue arise when Display Goes Off, I tuned this option to Never in settings and Just DIM the brightness to 0( It works but just a workaround for now)

Battery Option: Prevent automatic sleeping  on power adapter ON

Lockscreen: Display off setting- Never

Limit ip address tracking- Off

Reste router etc

I have Macbook Air 2012 and Macbopok Pro 2017 and and its uploading 100 time faster, its 2012 model - 12 year old and uploading faster than M3

Please help

I am a photographer and have to upload and download data almost every second day and its very inconvenient.