@MartinLudde 

Have you tried putting your ip 12 next to slave X60 (10cm), turn off & on phone wifi. Does it connect to slave X60? 

Also try this if you can see ip 12, same as above,  but this time slave X60 connect directly with main X60 via ethernet.

The reason to turn on off devices wifi because X60 not smart enough. In my X60 case, node 1 & 2 is 9m away- wireless backhaul, my f2 pro already connected node 1, but when I sit 1m next to node 2, it still connect to node 1. My other M9 set dont have this issue. Maybe due to wifi 6, with long signal.

@47Cosmos 

Thanks, if this is the only solution I think I will sell the system. My kids can't do this by them self :( 

the product was not marketed like this.

@MartinLudde I'll do more test, to see how long my wifi devices automatically switch to nearby node as it should be.

This time 02 X60 units ethernet backhaul 15m/49f away; 02 phones with wifi ac only & other 02 with ax.