Podcast player shows dot instead of play and stop buttons

In the editor the podcast player (default WordPress one) looks good, but on the front end play, stop and speaker icons are shows as dots. This is an issue since many years.

It is caused by the twentig plugin because it sets a background colour for these buttons. Solution:

body .jetpack-audio-player .mejs-button > button {
background-color: transparent !important;
}

So I fixed it in CSS but it would be better to fix it in the plugin. See https://www.ads-software.com/support/topic/podcast-player-shows-dot-instead-of-play-and-stop-buttons/#post-17282505