pt-table-sync generates empty replace commands

I am having an issue where pt-table-sync is generating empty replace commands. I believe it is due to the primary key of the table being a VARBINARY. However, using the pt-table-checksum flag --binary-index and the pt-table-sync flag --hex-blob does not seem to resolve the issue.

My belief is that --hex-blob is converting BINARY columns, but not VARBINARY.

Example of empty replace

Create table of table being checksummed

Create table of checksum table

pt-table-checksum command

pt-table-sync command

Sanitized Debug log is attached.