MT1300 is powered by the power adapter and type C able that comes with the router.
Yes
You connect MT1300’s USB3.0 port, to your MR1100 using a USB-A to USB-C cable. This cable is the problem and seems it is pulling high current from MT1300, causing wifi drops?
Yes and No, MR1100 is being powered by the MT1300 via 2 different USB-C to USB 3.0 cables; cable that works is old OEM Netgear cable that came with the MR1100. Cable that causes 2.4G WiFi to disappear is a brand new, short USB-C certified cable with 56k. I included Amazon link to exact cable in prior post. With this cable, 2.4G WiFi doesn’t come and go; it disappears altogether. Since this is a USB-C certified cable, I suspect the Beryl may be the problem, but I am not set up to test further or measure to see if the old Netgear cable also has 56k. Appreciate your help!