Ah yeah I see it now. The URL for the first game is //v6p9d9t4.ssl.hwcdn.net/html/3451821/player-js/index.html so I thought that the subdomain is random but it is always //v6p9d9t4.ssl.hwcdn.net which indeed causes the problem you mentioned. hm.
In the index.js is a string Module={EASYRPG_GAME:"". As a workaround you could change the "" to something else. Though this is untested, no idea if this works.