Apple Configurator 2 - Problems with cfgutil command on restore

Hello,

I use cfgutil tool of Apple Configurator to restore iOS devices which is functional most of the time.

However, I got 2 problems with this tool :

• Commands are very slow, simple commands like "list-devices" or "get-property" took at least 5 seconds to complete,
• "restore" command generate big temporary files (uncompressed firmwares ~ 3Go for each command) in folder "/private/var/folder/.../com.apple.configurator.xpc.DeviceService/TemporaryItems" and do not delete them at the end of the process (they disappear on reboot), so my disk is quickly full.

Are these known problems and do you know how I can resolve them ?

Thanks,

Florian