Paragarphs Looks light tight line. Why? Even the tracking value is +

Hi All,

I've one issue in this document, I attached the snapshot for your references.

First the paragraph texts having the tracking value is +5 some texts. And some texts are +20 tracking value. But the entire paragraph look very tight lines. If select the existing space and re-inserted once again its release and look normal. Why the problem behind in this document. If export the IDML and again open it everything looks normal.

1. Some texts are +5 tracking values. Below snapshot.

2. Remaining texts +20 tracking values. Below snapshot.

3. See the entire paragraph value is mixed, so its shown tracking box is blank. I agreed.

4. The story editor view for your reference.