Gear icon not visible in manage display drupal 9

Problem/Motivation

Gear icon not visible in manage display drupal 9

Steps to reproduce

Enable claro as admintheme
within a "manage display" page for a content type, the gear icons allowing to change change the field display settings are invisible

Proposed resolution

Drupal 9.5.7

The issue comes from https://stackpath.bootstrapcdn.com/bootstrap/scss/_reboot.scss

*::after {
  box-sizing: border-box; // 1
}

Applied on
<div class="field-plugin-settings-edit-wrapper">.......</div>

Release notes snippet