When deploying data records from production to sandbox, the default matching criteria for the owner field will not typically work...

Gearset currently matches on email and profile, but the email addresses for users get modified in sandboxes. So, no match is found for users other than the one who created the sandbox.

It would be great if the first check was: does the user record id match. If not, use email + profile, if not, use the current user.