2 of my mentoring clients messaged me and are experiencing the same exact issue.
Submit a ticket for the audio player issue: Submit a Support Ticket
In regards to
If you’re referring to this post: We're developing a better Audio component
it appears that @Taro is in the process of creating a custom audio player component but Taro does not work for Adalo. So if Taro releases a new audio player component, I would expect that you would have to purchase this component from Taro to get it.