Popup footnotes takes the whole screen

Usually I use MS Word to edit my books and then I upload them to Calibre, convert them to ePub and finally convert the ePub to Kfx format.

I noticed that the popup footnotes takes the whole screen when I use this procedure, even though the footnote is a single line

I tried converting an epub file from the internet (not converted from MS Word via calibre) and the footnotes worked perfectly.

When I convert from MS Word using calibre:
Attachment 185017

When I tried the internet file:
Attachment 185018

I attached both epub files for the internet version and the converted version down below:

Attached Thumbnails

   

Attached Files

	Converted file.epub (87.4 KB)
	internet file.epub (1.14 MB)