Router Continually Dropping Connection

[#1]

Amber light appears for 10-15 seconds then goes blue again

openreach attended site and confirmed there are no issues, good speed detected etc

already on second router and also disabled 5ghz wireless in case there were any conflicts

as I am writing this it's happened again

what can I do?

[#2]

Hi

I am also getting this problem.  Have you had any luck yet.  My amber light sometimes comes on for up to a minuted then turns blue again.