Deco BE85 network extremely unstable
I've recently installed a Deco BE85 mesh network in my small office with a view to improving network speed & coverage.
Unfortunately our experience so far has been extremely frustrating. We've changed the setup, reseted to factory settings and started from scratch more than 5 times already in the last couple of weeks. Still the network is showing a lot of instability.
The current setup is:
Modem > Cisco > Firewall (asigns IPs) > Switch > 5 x Deco BE85 in Access Point mode wired on Ethernet.
The office is about 5,000 sq ft and the Decos are set widely appart from each other.
We've only enabled the 5Ghz network for internal use and set the visitor network to just use the 2.4Ghz band.
6Ghz is enabled for wireless backhaul even if we have the whole setup wired, and MLO is not enabled. We tried to keep it as simple as possible.
To give you a clear & recent example: After a factory reset yesterday and installing then testing each Deco one by one, it was working fine. I left the last Deco for this morning, and when I added it to the wired setup, everything stopped working again. No or very poor connection on all devices.
Please help. Error log here.