Can't boot off of encrypted volume with Linux 5.3-rc4

[willismonroe at gmail.com]

I'm testing out a mainline kernel to see if it fixes some hardware issues
I'm having with my laptop (X1 Carbon gen 7) but I'm finding that booting
any of the 5.3-rc's results in an error that seems to be related to
encryption.  To clarify, 5.0 from the disco repositories boots fine, as
does 5.2.6 from the mainline series.

When I boot 5.3-rc4 the splash screen that normally asks for my password to
decrypt the volume instead reports:
====
cryptsetup: Waiting for encrypted source device UUID=7de...
====

and if I switch back to a virtual console I see these three lines repeated:
====
WARNING: Filed to connect to lvmetad. Falling back to device scanning.
Volume group "ubuntu-vg" not found
Cannot process volume group ubuntu-vg
====

I'm posting two files as well to provide context:

/etc/crypttab
====
nvme0n1p3_crypt UUID=7de0b924-cbc0-4b11-b683-14be7b468a9a none luks,discard
====

and
/etc/fstab
====
# <file system> <mount point>   <type>  <options>       <dump>  <pass>
/dev/mapper/ubuntu--vg-root /               ext4    errors=remount-ro 0
  1
# /boot was on /dev/nvme0n1p2 during installation
UUID=2969329c-dd54-4e5a-835f-952a04ca4ea7 /boot           ext4    defaults
       0       2
# /boot/efi was on /dev/nvme0n1p1 during installation
UUID=00EB-0582  /boot/efi       vfat    umask=0077      0       1
/dev/mapper/ubuntu--vg-swap_1 none            swap    sw              0
  0
====

As far as I know I haven't done anything to mess with the configuration of
the initramfs or cryptsetup, all of this should be the default from install.

Any help would be appreciated.
-Willis
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