"Delta cannot be calculated without cache"

Summary:

During a random check up of a quote in the Production environment, a "new" error started popping up every time an action was clicked.

Content (please ensure you mask any confidential information):

The error was detailed as "Delta cannot be caclculated without cache". Any actions attempted would result in the same message, including reconfigure, save, and return to opportunity. The quote was being accessed through Salesforce (via the standard integration), and when re-entered, the errors stopped appearing. There is a series of logs for each time the error was triggered, but as usual, these logs provide no insight on the cause of the issue.