Line break changes unnecessarily

The attached image should explain everything. I have a floating frame and a long paragraph below, when doing any slight change to the float frame (like position movement) then InDesign modifies the paragraph line breaks across the document.
Basically, this line break issue happens on any changes I do to the document. I tried creating a small dummy frame over the paragraphs, line break issue come up, and then deleting the dummy frame leaves the wrong/ modified line breaks as is it.
I tried changing the "Adobe paragraph composer" to Line Composer, but still the same problem.
Has anyone faced this problem earlier? any idea would be appreciated.
