POSB and DBS online Transaction Error

Quite a number of times when I use the POSB or DBS credit or debit card doing online transaction will encounter error.

After receiving the OTP from the DBS and enter the OTP, the system started to wait for 3dsg.dbs.com for the verification. Most of the time there will be time out and the transaction will not get through. However when I use other bank credit or debit card, no error will encounter.

I have reported the incident to the bank but this online transaction error still not solved.