Non-Qubes-Whonix Known bugs
Suspend / Hibernate Issues
Short: Better do not suspend or hilbernate your computer or Whonix VMs while Whonix is running.
Mounting (CD/DVD) Devices
Device auto mounter is broken.
See if Start menu -> System Settings -> Removable Media helps.
You can use the following workaround.
sudo mkdir /mnt/cdrom
sudo mount -o ro /dev/cdrom /mnt/cdrom/
Using the ro flag will mount the CD/DVD read-only. If you are not mounting a CD/DVD, then you can drop the "-o ro" parameter.
Help fixing this bug is welcome! (ticket)
VLC / Video Player Crash
You can use this workaround.
VLC -> Tools -> Preferences -> Video -> Output -> X11 -> Save
Network Manager Systray Unmanaged Devices
Short answer: unrelated. Forget about it.
Long answer: 
Whonix doesn't use network manager to either manage eth0 or eth1.
- In Non-Qubes-Whonix network is managed by ifupdown.
- Qubes-Whonix uses custom /lib/systemd/system/qubes-whonix-network.service and is unaffected by this issue.
All attempts so far fixing it have failed. Help required for fixing it.
Long standing known issue.
Fix Unmanaged Devices Network Manager
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