Hello, 

I've had the Deco X20 Whole Home Wifi System - Triplet Pack since 2020. It's pretty much worked perfectly the whole time, but I performed the firmware upgrade to 1.6.1 Build 20250910 Rel. 43292 from the app about a week ago and ever since various wireless devices have been disconnecting to finding it difficult to connect to the internet. 

The App on my phone is occasionally showing one or two of the X20 Decos as offline but then after a while they come back again. 

I haven't changed any settings or moved the deco's positions, everything is the same apart from the firmware update. I understand I cannot downgrade the firmware back to the previous version. What can I try to do to resolve this?

I have the main Deco setup in the Wi-Fi Router Mode.

This problem is affecting, laptops, TV's, Sky Streaming boxes - all disconnecting or failing to load content on a regular basis.

Any help would be appreciated.