Progress bar when cloning Persistent Storage from Tails Cloner

I am currently testing the "Clone the current Persistent Storage" feature of tails-installer

and I have been waiting 10 minutes at this screen:

Partitioning device /dev/sdb
Formatting /dev/sdb1 as FAT32
Verifying filesystem...
Extracting live image to the target device...
Wrote to device at 11 MB/sec
Reading extracted MBR from /media/amnesia/Tails/utils/mbr/mbr.bin
Installing bootloader...
Synchronizing data on disk...
Unmounting mounted filesystems on "/dev/sdb1"
Cloning Persistent Storage...

I have 6GB of data in my persistent storage and unlike with tails-backup, I have no way to tell if the process has stalled.

Even a simple text update message like

Cloning Persistent Storage...
10% complete
20% complete

would help significantly.