MacOS and USB has always been hit or miss. Some people have zero issues, some can’t get a connection. MacOS includes a driver that has known conflicts with the one used by the Ruida, and there’s nothing we can do to fix that.
The best possible option is to buy the $30 Ethernet adapter from Apple and plug a network cable between the Mac and the laser. It takes a little bit of effort to set it up, but it’s more stable and faster.
I will keep poking at the USB connection here to see if I can find anything, but I have four different Macs connected to Ruida controllers, and none of them are having any issues - it’s difficult to fix something I can’t reproduce.