Flipkart — Flipkart suddenly shows not deliverable in to my pincode

I have been purchasing from flipkart at pincode 686681 for almost 3-4 years now with no issue at all. Suddenly almost of the items from all the sellers went to Not Deliverable status / Currently out of stock for my pincode about 5 days ago. But when i got a order some days back at that time it was okay to deliver in my pincode 686681 it's showing available. Now it's shows not deliverable .Even at the peak time of corona it was deliverable but how come suddenly all items become not deliverable ?! .