FYI - Somewhere up above I mention my soundcloud embed issue. I was thinking it was this extension because I never noticed the issue before. But, based on conversation happening in the formatting extension thread, maybe it's that extension, or the core text formatter code itself. It might have popped up around beta 15 or 16?
Bottom line is, sometimes things don't auto embed. 🤷♂️ It's inconsistent. I assume it'll be very hard to troubleshoot.