Comment by graemep

There are lots of possible reasons. Some good, some bad.

A possible good reason might be that there is a higher level of fraud (e.g. faked financial statements), or a higher level of public charge in applications from some countries - especially if it is a pause while procedures are changed. On the other hand the true motive might be something else.

That said, I have no idea why its this particular list of countries. Why Thailand or Jamaica or Nepal?