WYSIWYG is not working as expected

Hello Guys,

Am Working on my private project, and came through the issue of this WYSIWYG Module.

Created a content type for updating a node with filtered-text type you can find the image "after-updating-image.png" i wanted the text to be formatted like this and its undoubtedly giving me the same as expected in the front end...
But the issue arises when i again visit on same node to update content it is displayed like in image "before-updating-image.png" all formatted/expected text are gone here and there...
so my user's are experiencing trouble while updating the content. Every-time when they in need, they have to update the node they want to recreate "formating" procedure/designing the content as expectation...

And I must say that there no console log errors but its displaying "

Synchronous XMLHttpRequest on the main thread is deprecated because of its detrimental effects to the end user's experience.

"

Can anyone help me with this issue?