@ryanlcs how is your second unit connected to the network? If it uses wifi link from the first Deco, then obviously it's on 2.4 GHz and maximum speed on this frequency is about 150 mbps...

@Ernest.Pruitt how did you get an update for Deco M4? On the web site and in app I see software only for 2019 year... By the way what is your hardware version (v1 or v2)?

Dear TP-Link! Consider a possibility to make one outdoor device for you Deco line products. If Deco is placed as a product for a big house, it is obvious that many would want to extend wifi coverage...

@WookieeFer Yap, Decos get IPs dinamically. For Decos control, application is a sufficient tool for me. It controlls Deco via TP-Link server, so it is no need to know current internal IP. If I need...

@WookieeFer I have the same stack of equipment as yours, but have no such a problem... Differences are: the hardware ver. of M4 - I have V.1; My Decos dinamic IPs are the part of the common pool;...

@WookieeFer Have you updated RouterOS to 6.47 (System --> Packages)? Also check System --> RouterBoard and update it also to 6.47