Why do some loops appear for some time keys, and disappear when I change key?

Hi

Why when doing a search do some loops appear for some keys, and disappear when I change key? Why does the key matter in a search? I did nothing to restrict the search to any certain key, don't know how or if it can be done.

Here's what happened:—

After choosing E major (in the box at top center of the app that has bar, beat, tempo, time signature, key), I tried to search loops for Star Power, which I'd used in another project, but only 3 loops showed up? Then when I changed to A major, 20+ loops appear in the search.

I don't recall that happening before. What's going on?

royks