For UPI transfer, request you to kindly ensure:
Fund transfer mandate is accepted within time limit.
You have not exhausted your overall UPI fund transfer limit (this is a maximum of Rs. 1 lac a day for most banks across all transactions).
The mandate you receive is accepted from the bank account linked and verified on Dhan. For example, a single UPI may be linked to your multiple bank accounts. You need to ensure you select your Dhan linked account when accepting the mandate in your UPI application.