The below is probably somewhat related to khaledhosny/harftex#11.
In beamer.cls, color of text can be white. After use of emoji in Segoe UI Emoji font, the color of text becomes black. A short example is below. PDF generated by harflatex 0.4.1 is attached below.
\documentclass{beamer}
\usepackage{harfload}
\usepackage{fontspec}
\setsansfont{Segoe UI Emoji}[
RawFeature={mode=harf,+dist;+ccmp}]
\usetheme{Madrid}
\begin{document}
\begin{frame}{text 😂 text after emoji}
\end{frame}
\end{document}
The below is probably somewhat related to khaledhosny/harftex#11. In beamer.cls, color of text can be white. After use of emoji in Segoe UI Emoji font, the color of text becomes black. A short example is below. PDF generated by harflatex 0.4.1 is attached below.
incorrect-color.pdf