After upgrade to Ventura 13.2 can't mount thumb drive

13" MacBook Pro, 2020 M1 Apple chip

Ventura 13.2

DVDIVO 128 GB USB-C APFS Encrypted volume

The password is stored on the Keychain (correctly).

Since upgrading to Ventura 13.2, this drive will no longer mount. It's visible in Disk Utility, but attempting to mount it manually fails with the error:

Could not mount “DIDIVO128”. (com.apple.DiskManagement.disenter error 49218.)

Tried running First Aid on the drive, the container and the Physical disk, all failed with errors along this line:

First Aid process has failed. If possible back up the data on this volume. Click Done to continue.

Error: failed to enable crypto I/O mode for container /dev/rdisk5: Invalid argument

The partition map needs to be repaired because there’s a problem with the EFI system’s file system.: (-69766)

Some APFS cryptographic state information was unexpectedly unavailable.: (-69461)

A couple of days prior to the upgrade, the drive mounted and ejected normally.

Another (unencrypted) drive of the same brand and type (but formatted as ExFAT) mounts normally (thoguh it seems to take longer than before).

Shut down and started in Safe Mode, then restarted. Neither had any effect. Switching ports, no effect.

The drive has both USB-A and USB-C plugs, so for the sake of completeness (because why not?) I even tried connecting the USB-A to an adapter in case there was a dead pin in the connector. No joy.

There are other use cases that are similar in the community but nothing directly on point, so I'm kind of short on ideas.