Why does the embed in wordpress cause loss of functionality....
in some themes, and some apps. I noticed experimenting that if you make a block fixed, it floats down the page with you, as you scroll. it works perfectly, yet when it is embedded it loses the ability to move as you scroll. also some themes seem to loose some functionality. I tested the Bootstrap @kasperisager embedded in wordpress and I believe the control bar that slides normally when not embedded becomes fixed in place.
I'm just curious how to solve some of these issues when embedded in wordpress, if anyone knows how to solve them, if it is possible.
I may not provide the completed solution you might desire, but I do try to provide honest suggestions to help you solve your issue.