Flipkart — Most of the products are suddenly not deliverable at my pin

I have been purchasing from flipkart at pincode 822101 for almost 3-4 years and also been a flipkart plus member till now with no issue at all. Suddenly almost 90% of the items from almost all the sellers went to Not Deliverable status / Currently out of stock for 822101 about 5 days ago. HOW SUDDENLY ALMOST ALL THE PRODUCTS went to Not Deliverable status for the first pincode. This is true for same product for multiple sellers. This doesn't even make sense. Flipkart is not even acknowledging the issue at their end and is giving a very generic answer that does not help at all