Network issues after upgrading to Stretch + kernel to 5.4

[carmel85]

Recently we purchased NetPi3 (model: NIOT-E-NPI3-51-EN-RE) for evaluation.
we have our project working on RPI3 with Jessie image. (our Jessie image seems to work fine on NetPi.)
today I tried to use our new upgraded image ( Stretch + Kernel 5.4) on NetPi
but network interfaces failed
here are steps for upgrade:

1. Update
   
2. Upgrade
   
3. Dist-upgrade
   
4. Rpi-updtae (updates Kernel)
   
5. Switch to Stretch
   
6. Update
   
7. Upgrade
   
8. Dist-upgrade (or full-upgrade) – this is not working well, it removes our internal "SA" service and more. this mechanism is also removing packeges/services as opposed to “upgrade”
   
   1. So I did not performed it
      
9. Rpi-updtae (for Kernel)
   
10. Kernel version now is 5.4.51
    

 
Unfortunately After I inserted SD with Stretch (+new Kernel) into NetPi
It had network issue: LAN + Wifi interfaces could not be up.
attached screenshots.

Any idea why network stopped working on NetPi? (on RPI 3 it works fine with same image)

Carmel.