Phantom drives

I recently purchased a hEX to run the Dude, which required me to add flash/microSD storage, the first time I have done this on a MikroTik.

When I added the devices, they came up named disk2, disk3, etc. as expected. To make it clearer which one was what when I was moving files around, I renamed them to USB and microSD. That all worked great.

The issue is that whenever the hEX is rebooted, along with the volumes USB and microSD, the phantom volumes disk1, disk2, and disk5 also appear. I can delete them, but they just come back next time the hEX is rebooted. The hEX really does consider them volumes, not folders, because the type shows up as “disk” in Files – but if I look in System/Disks, only the two real volumes appear.

Does someone know a way to stop this from happening, or should I just report it as a bug?