What happened to family sharing?

My husband and I had been successfully and happily sharing this app for probably close to two years, syncing our grocery lists so that we both knew what was needed at all times. Then, suddenly, and with no warning my husbands shared version of this app disappeared after we set up home sharing and it looks like the app developers no longer support it. This was the primary reason I upgraded from the free version. I feel cheated, and very disappointed.

On Michs iGadgets about Shopping List (Grocery List), v1.71