When I receive a letter that there is a new reply in my thread and click a link to open the thread, thaivisa.com forum opens and in a few second I am being force-redirect to a malware/virus website.

I've seen this before. This happens through a rogue advertising network code. And you have way too many advertisements already on the mobile forum. Some network is randomly injecting redirect code into one of the ads which is executed automatically.

Clean this out before you start loosing people.

See screenshots.

Hi,

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​Thanks for the screenshots, can you confirm its the mobile browser version and not the thaivisa connect app.

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​Also what thread are you getting a reply from so we can try and replicate the issue

Some of our banners have now been replaced and changed. Please let us know if this issue is still happening as we cannot replicate the issue.

Yep, that was the thaivisa mobile page, not the app.

Looks like the problem is gone (for now).

The link was http://www.thaivisa.com/forum/topic/926659-loud-islam-prayer-coming-from-mosque-speakers-at-4-am/?view=getnewpost&utm_source=notification&utm_medium=email&utm_campaign=forum

Removed a troll post.