Printer Ports switches with different printer
I am on a trial for the repetier server and am still deciding to purchase it. I have my repetier server on a Raspberry Pi 3 using a USB 3.0 hub with independent 12v power. I have 5 printers connected. I have setup them okay and working. If i turn off more than 2 printers, sometimes they get swapped for the assigned ports. Also, if I Force Stop/abort a printer (red hand icon), one or more printers stop too. These issue are critical. Can someone shed light to these issues?