Please see the screenshot. Joomla 3.10.6. JCE Pro 2.9.20.

On the front end...
Drop-down works, but has no title... just blank box. I have cleared my browser cache & reloaded the page... doesn't help.

Back end is OK.

thanks,
JC

Thanks, Ryan. I added the following to my template's custom CSS code and now is working:

.btn-link, .btn-link:hover {
    color: #555 !important;
}

button#jform_articletext_fontsizeselect_text {
    color: #555 !important;
}