Basically my speeds per Ookla have dropped from between 400 and 900 Mbps to under 100. Usable for sure but that's not the point. I've had my Deco mesh running for over a year with no issues beyond the occasional disconnection from the Internet. Now suddenly this. 

It's been over 12 hours and no amount of system reboots are fixing the issue. I would say the hardware needs a firmware update but when I check, the app tells me I'm up to date. Very frustrated. Find it odd I'm suddenly having Deco issues just as TP-Link is under investigation 🤔