When looking at older promo campaigns, you may see a campaign that no longer has the redeemable attached to it, as shown here:
When this happens, it is likely a result of the corresponding redeemable having expired. Since expired redeemables cannot be associated with campaigns, they stop showing up in this field once they expire.
If further assistance is required, submit a ticket to Punchh Support. (For help submitting a ticket, click here)