Checking in logs i can observe that Orders placed (specially at the start of the market) are staying longer in VALIDATION PENDING state these days. Please check once. If you need any examples, i can post some from order history.
Also can you please clarify few question i have... that if an order is in VALIDATION PENDING state, it has not yet been sent to exchange. Right? And Validation of order under this state takes place at zerodha end. Correct?