Why doesn't the webviewer see the Visual Composer gallery module?

Question

WordPress

There is a one-pager, it has a very strange glitch, the web browser sees all Visual Composer modules except for the gallery. Moreover, the site was completely redone from scratch, but the old one had exactly the same situation. Has anyone experienced this and solved it? From reflections, when loading the gallery uses css animation of the form
animation-name: zoomIn;
animation-duration: 1s;
animation-fill-mode: both;
but there is also a button that appears without animation, but it is also not visible. On the old site, animation was also present when other blocks appeared, and there were no problems with them when displayed in the web browser.