No issues in last 2 years.
As per me,
Shopping means Westside, Trends etc. as long as MCC shopping = 5%
Grocery/Supermarket (I use local grocery stores and still getting 5% on rice bags, oils etc. don't have to go D-Mart for everything as long as MCC is Grocery) = 5%.
Departmental is like combination of both like D-Mart etc = 5%.
These are my definitions and based on my usage I can assure you it works fine.
As long as your spends above 1k, I don't think its much an issue to slash 3000 per transaction.
Do check the latest TnCs related to this card, a very good card those who spend on these categories..
As per my usage, it works fine nearby Grocery stores (local), Shopping (local) along with big departmental stores. No issues till today.
Though, now I'm shifting my spends to Online Grocery apps and Gyftr voucher stores but still if one finds the usage, it gives good cashback.
Below link available in product page too.