Dashboard widgets remain empty despite historical data existing in InfluxDB and backend returning it correctly #1543

I am experiencing a very strange issue where my Dashboard widgets (e.g., Measurement 1 Value) are completely empty, even though the data exists in InfluxDB and the Mycodo backend seems to fetch it correctly.

1. I verified that the data is visible on the standalone "Asynchronous Graph" and Live pages.
2. I even ran a local Python script directly invoking the Flask last_data(...) function used by the Dashboard
   endpoint ( /last/... ), and it successfully returns the data!.

The Problem:
Despite all the above working perfectly, the Dashboard itself remains completely empty. The Measurement or another widgets does not display the value or the timestamp.

I would appreciate any pointers on why the frontend might be rejecting/hiding data that the backend is
successfully querying.

Environment

• Mycodo Version: 8.x
• Browser: Chrome/Firefox
• OS: Linux