libre office writer hangs or freeze when editing the first page

While editing in 104 pages document’s first page. Shows number of pages increases automatically. Please give a solution

(edit: activated screenshot)

This rings bells in my head but I wasn’t able to find back the question and its solution.

What is your OS and LO version?

Finally I found it as bug tdf#123098. Please report your LO version as this seems to be an important factor.

Thanks for your reply. I use Libre Office 6.4 Version in my Windows 8 PC (64 bit)