Shared Folders: if disk removed from host, all disks don't auto-mount in guest

[Technologov]

Host: Win7 + VBox 5.2.22 (tried 6.0-BETA3)

Guest: Debian Linux 9

I have multiple mounts enabled:

1. DRIVE_C
2. DRIVE_D
3. DRIVE_E
4. DRIVE_F

now... I have removed drive D from host (physically disconnecting HDD). what happens next is that Auto-mount only works for Disk C, then it fails for D (expected), but also for Disk E and F... (which must not happen). Every letter is physically separate HDD.

root@deb9ws:~# ls /media/sf_C_DRIVE/                                                                                                                                                                              
$Recycle.Bin  Documents and Settings  Install-UltraISO  PerfLogs             Python26                   Temp        WinBoard-4.8.0  hiberfil.sys  virtualbox-opennodes-2018-12-03                                 
$WINDOWS.~BT  Dropbox                 Install.log       Program Files        Recovery                   Temp-Music  Windows         log.log       win32-loader                                                    
$Windows.~WS  Fraps                   Intel             Program Files (x86)  SIERRA                     Temp2       csb.log         log.txt                                                                       
Config.Msi    Games                   NeroHistory_All   ProgramData          System Volume Information  Users       found.000       pagefile.sys                                                                  
root@deb9ws:~# ls /media/sf_D_DRIVE/
root@deb9ws:~# ls /media/sf_E_DRIVE/
root@deb9ws:~# ls /media/sf_F_DRIVE/

-Technologov. 04.12.2018.

[Technologov]

Vbox.log