iOS6 freeze, quit or jerky scrolling, browsing with Burmese (Myanmar) unicode fonts

Unicode fonts have been used for many years.

We use Burmese Unicode fonts name Zawgyi Unicode font to view our language on web.

We use special apps (Mogok, Myanmar Browser lite) for viewing on iPhone and iPad as this font is not embeded.

They are OK to view all our language sites without problems prior iOS 6.

Now with iOS6, the problems come.

Safari engine (rendering for web pages) causes those apps frozen, quit or jerky scrolling on all Apps especially Mail, Safari and other Myanmar apps.

If we receive emails with our unicode fonts, Mail App is frozen or quit.

Not even that font, Apple approved Myanmar Unicode fonts also have the same issue.

Here is the web link (Mizzima News - Burmese) you can browse on iOS Safari and you won't see the language display but you will see the problem. If you download the apps that I have mentioned, you will be able to view the fonts.

This is not an isolated incident. It happen on all iphones and ipads with iOS6.

So, it is clearly A BUG.