I began experiencing the very same issue reported above a few weeks ago in Bangkok. It started with the Daily Mail's website and then extended to a number of others, and can only be circumvented, in my case, by using a VPN. It only very recently occurred to me that the cause of the problem is my AIS Fibre internet connection.
Before I attempt to contact the nice people at AIS, has anyone else encountered such situation and/or can offer a solution other than using a VPN?