Freezed view

I’m fighting with settings of Wooshop:
https://e-babystuff.pl/
and have no clue what and where is the problem:
1. When scroling down the shop it sometimes freezed for a second and you have to wait a moment to see rest of the page or if you want to go to next page, product…
2. In the admin area after saving changes in a product you have to wait some time to be saved.
I’ve turned off all other plugins and have left only demanded.

Please help.