A month or so ago I read about this issue and pre-empted being blocked by calling in at Kasikorn. They knew nothing about it so called the service centre. I was assured there's no problem, my name matched the SIM card details and my bank application.
This week without warning my bank locked me out and a message read I have to attend my bank branch to verify my id which I did. Signed umpteen tablet signature blocks, had a photo taken, showed my passport, spoke to the call centre, had to provide my previous overseas address and was issued a new passbook for some reason. The app worked again. The following day, blocked. Message, call to branch and take letter/form from SIM card provider stating name, address and id document number.
Back to the bank and went through the process again...