Rapbian not recognizing encrypted LUKS flash drives

after upgrading to bionic, attempts to mount an encrypted USB drive fail with the error "function bd_crypto_luks_open_blob called but not implemented"

Installing libblockdev-crypto2 and libblockdev-crypto-dev and rebooting appears to have fixed it, but should that be necessary? or at least better documented? (https://www.distrowatch.com/weekly.php?issue=20171113 is the only reference I could find on the error)

[Workaround]
1. Install libblockdev-crypto2
2. Restart udisks:
  $ systemctl restart udisks2