ip kvm interface appears as mounted device with errors

[republicus]

I have an Avocent IP KVM with DSAVIQ-USB2 interfaces attached to my servers.
Ive updated udev which is now at version 241.

I am now seeing:

Generating grub configuration file ...
  /dev/sdb: open failed: No medium found
  /dev/sdc: open failed: No medium found
  /dev/sdb: open failed: No medium found
  /dev/sdc: open failed: No medium found
  /dev/sdb: open failed: No medium found
  /dev/sdc: open failed: No medium found
  /dev/sdb: open failed: No medium found
  /dev/sdc: open failed: No medium found
  /dev/sdb: open failed: No medium found
  /dev/sdc: open failed: No medium found
  /dev/sdb: open failed: No medium found
  /dev/sdc: open failed: No medium found
  /dev/sdb: open failed: No medium found
  /dev/sdc: open failed: No medium found
  /dev/sdb: open failed: No medium found
  /dev/sdc: open failed: No medium found
  /dev/sdb: open failed: No medium found
  /dev/sdc: open failed: No medium found
  /dev/sdb: open failed: No medium found
  /dev/sdc: open failed: No medium found
Found linux image: /boot/vmlinuz-5.0.21-1-pve
Found initrd image: /boot/initrd.img-5.0.21-1-pve
  /dev/sdb: open failed: No medium found
  /dev/sdc: open failed: No medium found
  /dev/sdb: open failed: No medium found
  /dev/sdc: open failed: No medium found
  /dev/sdb: open failed: No medium found
  /dev/sdc: open failed: No medium found
  /dev/sdb: open failed: No medium found
  /dev/sdc: open failed: No medium found
  /dev/sdb: open failed: No medium found
  /dev/sdc: open failed: No medium found
  /dev/sdb: open failed: No medium found
  /dev/sdc: open failed: No medium found
  /dev/sdb: open failed: No medium found
  /dev/sdc: open failed: No medium found
  /dev/sdb: open failed: No medium found
  /dev/sdc: open failed: No medium found
Found linux image: /boot/vmlinuz-4.15.18-20-pve
Found initrd image: /boot/initrd.img-4.15.18-20-pve
Found linux image: /boot/vmlinuz-4.15.18-12-pve
Found initrd image: /boot/initrd.img-4.15.18-12-pve
  /dev/sdb: open failed: No medium found
  /dev/sdc: open failed: No medium found
  /dev/sdb: open failed: No medium found
  /dev/sdc: open failed: No medium found
  /dev/sdb: open failed: No medium found
  /dev/sdc: open failed: No medium found
  /dev/sdb: open failed: No medium found
  /dev/sdc: open failed: No medium found
  /dev/sdb: open failed: No medium found
  /dev/sdc: open failed: No medium found
  /dev/sdb: open failed: No medium found
  /dev/sdc: open failed: No medium found
  /dev/sdb: open failed: No medium found
  /dev/sdc: open failed: No medium found
  /dev/sdb: open failed: No medium found
  /dev/sdc: open failed: No medium found
  /dev/sdb: open failed: No medium found
  /dev/sdc: open failed: No medium found
  /dev/sdb: open failed: No medium found
  /dev/sdc: open failed: No medium found
Found memtest86+ image: /boot/memtest86+.bin
Found memtest86+ multiboot image: /boot/memtest86+_multiboot.bin
done

One device was an IPMI mounted ISO and the second is my Avocent IP KVM interface.
Once I unmounted the IPMI ISO I am only seeing errors for /dev/sdb for the KVM interface.

This is a new issue that was not present before upgrading my system.

This error is also preventing my QEMU vm with pci-passthrough from starting. I see the same error when attempting to start my vm.