RBE970 Orbi 970 stops Broadcastin WLAN SSIDS

My Orbi is on Firmware: V9.12.2.1_1.2.10 (Router and Sattelite)

I recently changed my Internet Provider from a Cable(TV) to a Fiber FTTG that uses PPPoE Login.
I have this Problem on my router that forces me to reboot the router  regularly:
https://community.netgear.com/t5/Orbi-WiFi-7-BE-Mesh-Systems/RBE970-Orbi-970-stops-Broadcastin-WLAN-SSIDS/m-p/2379608/highlight/true#M1726

 No Reconnect of PPPoE
Since i am on FTTH PPPoe (Provider Init7 Switzerland) after the Reboot, the Orbi does not connect to the PPPoE anymore. I have to disable PPPoE, reboot the Router, then Set up PPPoE again and Reboot the Router again to get back my internet Connection. !!

Slow Upload on Wired Connections
When the router is connected to the internet (Speedtest at Rourer give 4000Up and 4000 mbps)
On Wlan Connected devices i get a good Speed too.
But wired Connections, no matter if i am connected to 10 gbps or 2.5gbps Port i get an Upload of a few kbps on virtually every speedtest i could find.
Its exactly the same Problem that is described on reddit here 7 Month ago :
https://www.reddit.com/r/orbi/comments/177y2nh/orbi_970_wired_upload_speed_on_gigabit_01_mbps/

The funny thing is obviously the upload is nt bad for everything:
MS Teams works fine for Audio and Video and Chat (Cam up and downstream is good)
But uploading a File to MS Teams is terirbly Slow.
Reading on the Netgear Community works find but posting something results in Timeouts.
Uploading files to Google Drive Works.
Uploading an Image to Gmail iszt extreamly Slow.
All Speedtest sites report drastically low upload.

This all happens only if the Router is connected to a Synchronous FTTH Conection with PPPoE
My Old Router does not have this Problems oin the same FTTH PPPoe Setup.
So its clearly a Problem of my Orbi

Ideas anyone.. I can not tell you how disapointed i am after buying such an expensive device