How to format comment parameter in Record Event History ?

I have the requirement of adding Event history comments for a record. As the comments needs to be encrypted, we can encrypt the data once it's written in DB. While getting the data in record I am decrypting the comments in the Record List Configuration. I am getting the decrypted comment in the record List but in the interface of Event History I am getting the encrypted text (same as DB) even after syncing the record.

As in image, I want to apply the same decryption rule as "details" parameter over "comment" parameter.

Let me know if we can leverage any function or is there any work around for this.