AI Mesh node dropping internet connection when people connect to network

[taarzan]

Hi, I have a RT-AC1900P as my main router and a Blue Cave router for a AI Mesh node. I have my desktop PC connected via ethernet into the Blue Cave router. Whenever someone comes home and joins the network, my internet connection drops for around a minute or so. The issues seems to only occur for the devices connected the Blue Cave as there's another PC connected via ethernet to the RT-AC1900P and they are unaffected. Any solutions or ideas?

 

[tiddlywink]

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[Tech9]

This Blue Cave router runs early AiMesh 1.0 on >3 years old firmware. I'm afraid the solution here is hardware upgrade.