Firefox - Width not calculated correctly causing slideshow to overlap text

Problem/Motivation

This seems to be only happening on Firefox. When there's a field slideshow, 9 times out of 10, the slideshow overlaps the text that is supposed to float around the slideshow. When I manually edit the width in Inspect element, it looks like what it should look like. Attached are screenshots of Firefox on default, Firefox with the forced Inspect Element fix, and Chrome on default in comparison.

Steps to reproduce

Field Slideshow 7.x-2.0-beta2
Drupal core 7.84
PHP 7.4.25

CSS
.field-slideshow-wrapper {float: left;}

Manage Display
Image field appear right before Body field.

1. Image | Format=Slideshow
2. Body | Format=Default