Some additional info:
A maximum of ₹2,00,000 can be loaded to your slice account at any point of time and within 24hrs of onboarding you will be able to add ₹50,000.
The slice account can be loaded using Debit card/NetBanking/UPI/Credit card.
However, you can only add 1,00,000 via UPI and...
Added ₹ 500 to Slice Account using CC
Transfer to UPI ID -> Worked
Added ₹ 10k more
Transfer to UPI ID on big amounts -> Failing
Small amounts like ₹ 50, 250 are working for transferring to UPI ID.
Transfer to Bank Account on big amounts -> Working