Shopify Search & Discovery

This app doesn't delete old Color variants. More empathically, I deleted all Color variants from all products, and when I tried to create a new Color filter with new Color variants, the old colors keep pre-populating., colors that don't exist anymore. It appears that the old Color variants are still cached somewhere in the app. In addition to that, the Color filter appears to be buggy in that some Color variants may appear (but there are not visible, only you can see the name if hover over the Color filter area. Very weird and strange behavior from this app.