Where used is different, how to sync?

Good Morning!

I noticed when I search for an item in the EPDM folder I can see only some of the higher level assemblies of where it used.

If I`am in the SW, and click on Where Used (on the Task Pane) it opens a separate window and its actually shows many more assemblies.

Does anyone knows where is the problem? Why these two are different?

SW 2015 SP5

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