Hi all. I had the exact same issue after 1.8.1 upgrade. I am glad I found this thread. I upgraded using the macOS update program and now my Deco M9 Plus v2 is connecting to the strongest signal once...

@TP-Link_Deco Hi TP Link. There are many people asking for an outdoor Deco access point. Could you provide us with any update on any developments on this? Thanks!

I also have a requirement for an outdoor Deco access point! Where do I sign?