WIFI on EMG2926

so......

up until 3 months ago, wifi (2G and 5G) worked great !!!

EMG2926 wired in basement to 2 pcs and Xbox adn smart tv on main floor

2G repeaters and 2nd router as an extender made the whole house an awesome wifi zone...

now

2G constantly drops and all wifi devices (cells, ipads) have a long time in connecting and will drop the 2G signal frequently

but the wired connections are still great

I have redone all the settings, reset the EMG router and even factory reset the EMG but STILL wifi signals are garbage

help?

please and thanks