We've got M5 models, and since switching over our wifi provider to Starlink, we've had issues with one of the deco boosters in the far bedroom. Overnight, every night; it goes to red and stops working. 
 

When I go to check it in wifi settings on my iPhone, it says "isn't compatible with iCloud

Private Relay. To access the internet on this network, you need to turn off Private Relay.

Turning off Private Relay means this network can monitor your internet activity and your IP address will not be hidden from known trackers or websites."

I'm very confused as to why it's fine during the day, but only crops up with this message at night. 
 

any advice or guidance much appreciated!