During boot, ubuntu asks for password for one ecrypted disk only

I have two encrypted partitions/disks.
cat /etc/crypttab
sda3_crypt UUID=2d47e31d-a5d4-4589-aa63-1f5b6b037606 none luks,discard
vmware_crypt UUID=07f01c1f-ca57-4c41-a913-c319544ed0fe none luks,discard

When I boot, it only asks for one password to be entered. Usually asks for vmware_crypt.
But when I am logged in, I can use both partitions on their mount points.

So, sda3_crypt is also unencrypted. I have same passwords and maybe it tried to unlock it with the same password?
My vmware_crypt and sda3 are on different disks.

It is a good feature, not to have to enter passwords twice, but is this expected behavior?

ProblemType: Bug
DistroRelease: Ubuntu 16.04
Package: cryptsetup 2:1.6.6-5ubuntu2
ProcVersionSignature: Ubuntu 4.4.0-38.57-generic 4.4.19
Uname: Linux 4.4.0-38-generic x86_64
ApportVersion: 2.20.1-0ubuntu2.1
Architecture: amd64
CurrentDesktop: GNOME
Date: Fri Oct 7 08:30:20 2016
SourcePackage: cryptsetup
UpgradeStatus: No upgrade log present (probably fresh install)
crypttab:
 sda3_crypt UUID=2d47e31d-a5d4-4589-aa63-1f5b6b037606 none luks,discard
 vmware_crypt UUID=07f01c1f-ca57-4c41-a913-c319544ed0fe none luks,discard