Thank you for reporting the issue. Our investigation revealed that the problem manifests in multiple use cases.
We have fixed the issue in some of the use cases and are currently working on the remaining ones.
Please update your InDesign to the latest version, id 14.0.3 to try out the fix.
We shall update here once we have addressed all the remaining use case
We appreciate your cooperation.
-InDesign TeamMohamed commented
Try re-arranging the layers. Drag the background to the bottom-most layer.