Bug: 6.5.0 - standalone download... any icon referenced in css with unicode no longer works

Bug description

Any icons referenced in css with unicode no longer work. For example :

.carousel-control-prev-icon:before,
.carousel-control-next-icon:before {
    display: inline-block;
    text-rendering: auto;
    -webkit-font-smoothing: antialiased;
   	font: var(--fa-font-solid);

	font-size: 3rem;
}
.carousel-control-prev-icon:before{
	content: "\f053"; /*fas fa-chevron-left*/
}
.carousel-control-next-icon:before {
	content: "\f054"; /*fas fa-chevron-right*/
}

See added comment below this post for the fix that needs implemented for this issue.

Reproducible test case

No response

Screenshots

No response

Font Awesome version

v6.5.0

Serving

Kit, Self-hosted

Implementation

CSS

Browser and Operating System

Windows 11 - any browser

Web bug report checklist

• I have included a test case because my odds go way up that the team can fix this when I do
• I have searched for existing issues and to the best of my knowledge this is not a duplicate