which token is not hashed? Are you referring to newly minted tokens? Or existing tokens? I would expect this hashing to happen only on newly minted tokens.
Seems like either a bug, or a mis-configuration. Yes, I would advise raising a support ticket. My further advice: Be as thorough as you can in the initial report to avoid the round-trip back-and-forths in which the support engineer will ask incremental questions. For example, be clear about how you came to the conclusion that newly minted tokens are not hashed. Show the exact steps you performed and the results you saw. etc etc.