We are currently running EPiServer Commerce 9.22.0. For a while our "Belongs to" tabs have been completely empty.

In some recent version of commerce this seems to be somewhat fixed, but I still frequently view products/SKUs in EPiServer where it's missing data or still completely blank even though I'm clearly viewing an SKU that belongs to a product.

In general it feels like support for having products/SKUs in multiple locations in the catalog is bad and not properly tested. For a while selecting a product in the commerce tree would instead select another random copy of it (you were unable to select each version individually).

Setting sort order becomes very hard as well because there is only one sort order per product/sku. Not one for each hierarchial location. Therefore it can be very hard to set a SortIndex through commerce manager since the SortIndex will be used in multiple listings.