Misplaced or overflow just after loaded

Problem/Motivation

I Installed this module today for main visual. I tried "margin:0 auto;" for aligning center, and I also tried to create "width (1900)" preset, but for both case, the first image is not placed as I thought.

Proposed resolution

On load, all css should be applied from the beginning.

circumstances

Drupal 10 Google Chrome,safari, firefox