@Nardol I am on the same boat. Deco M5 causing constant disconnects for my Nuki SmartLock 3.0 Pro and some ESP32 devices. It started with upgrading from 1.6.5 to 1.7.1. I had to disconnect SL3PRO...

@David-TP Before downgrading I tried enabling ECO mode on Deco but set to "Power mode - Normal mode". Since then no more disconnects. Could be some bug while ECO mode is disabled on Deco?

@David-TP I'm experiencing constant disconnects and battery drain with Nuki SmartLock 3.0 Pro since updating my M5 network (4 devices total) to 1.7.1. How do I downgrade to my previous flawlessly...

No it's not 1.2.4. The instructions says it's not for users running 1.2.4. It's definitely 1.2.5 with build number 20190228.

I applied the patch to all my units even none of them was pulsating blue. It sorted out all my disconnection issues back to normal.

Did anyone tried this: https://community.tp-link.com/us/home/forum/topic/156171?page=1&t=2019%2F02%2F28%2023%3A50%3A50%20%2B0000 ? Any success?