How to fix a glitch when viewing pictures on the site?

Question

Online shopping

When viewing pictures of any product in the online store from a smartphone, a glitch appears - the viewing area shifts 2 screens down.
How to fix this glitch?
Here is an example of a product: orac.ru/lepnina/plintusy/plintus-orac-axxent-sx105

Answer 1

<div 
  class="mfp-wrap mfp-gallery mfp-close-btn-in mfp-auto-cursor mfp-ready"
  tabindex="-1" 
  style="top: 318px;position: absolute;height: 4166px;"
>
    ...
</div>

height: 4166px; The style is added to the div when the image is clicked. Look for exactly how this style is formed.