If a report is created for particular interface list, if one of the interfaces is removed from a device (that was part of that saved report) the report will no longer work and will show empty data for all interfaces unless you remove that 1 interface from the report interface list.
If you bring up the list of interfaces you will see blanks where the deleted interfaces once were.
Spectrum is a data source as well, the interface still exists in Spectrum.
DX NetOps Performance Management 23.3.10 or earlier.
Defect: DE576896
This issue has been fixed in DX Netops 23.3.11 and later.
From the 23.3.11 Fixed Issues list:
Symptom: With fixed item context used with on-demand reports/dynamic trend views, reporting breaks if an interface that was added is no longer known as an interface to the data aggregator source, but is still known in DX NetOps Spectrum (Spectrum).
Resolution: With this fix, if you have added an interface to the list of fixed context items to an On-Demand Report/Dynamic Trend View, and then subsequently the data aggregator no longer supports the interface, but is still known by the other data source, the report will now work without the need to first delete the no-longer-supported interface.
(23.3.11, DE576896, 33507118)