“thanks for your replay i made check for empty page got same result even height not change” – What is URL of that page?
Have you tried to disable 3rd party plugin?
“what is recommended cache plugin to use with Xstore” – do you mean cache plugin you used caused the problem or is it a separate independent question?
Read about cache plugins in this article – https://xstore.helpscoutdocs.com/article/100-how-to-speed-up-my-website
