The thing is ... is that ...

Let's do a poll. Have have heard of such a strange arrangement of words --

The thing is ... is that ... she does not know.

?

(Note that this is a pattern and it manifests itself in several other contexts and situations).

I get irritated when I listen to such a statement. It happens in a face-to-face conversation. The speaker probably chooses to do something like this mainly to appear fluent. But I have seen this pattern in the statements made by people whose mother tongue is English.