Thank you so much for that detailed response! I suspected that it had to do with the WordPress update.
I wasn’t using soundcloud initially (I was storing stuff on lib syn and putting the download link into power press), but I may switch to using soundcloud exclusively since the player seems to have less issues, at least for the moment. It’s just slightly more hassle to get a download link for powerpress. And the only other issue was not having the subscribe links, but hopefully by following your suggestion that will no longer be an issue!
Thank you for your reply. Yes, the support team at blue host verified that it was the theme. And I have clicked the disable media option (both the general one at the top in appearances and the other one that appears under player location), and that stubborn black rectangle that does nothing is still there.