It's a Dell XPS13 with a plain installation, I mean there is only a home, system and swap partition, not counting the two Dell's factory partitions that I've left, the home is not crypted and I'm not using LVM or RAID configurations.
I've tried to install it again but at boot I'm still dropped to the initramfs shell.
In the desktop that I'm using right I put the package on hold, I can try to see if I can replicate the same behaviour...
$ LANG=C apt-cache policy initramfs-tools ~
initramfs-tools:
Installed: 0.116
Candidate: 0.117
Version table:
0.117 0
500
http://ftp.it.debian.org/debian/ sid/main amd64 Packages
*** 0.116 0
100 /var/lib/dpkg/status