The shopping list-feature seems pretty unreliable as of now. I frequently have one or another issue with that:
- Items beeing marked "completed" appear again. (In no time)
- Items beeing marked "completed" appear again after several "hours"
currently it works "best", if you directly "complete" and "remove" an item while shopping.
Trying to remove multiple items almost always results in every removed item beeing added to your list again.