Thanks for letting us know which plugin you were having troubles with.
It seems that DHPopup uses a script that tracks elements that has a popup id in its href.
This means that if Buttonizer renders its elements later than DHPopup, it will not be tracked by the script and will not trigger the popup when clicked.
Unfortunately, we are not familiar with DHPopup.
You could perhaps reach out to the developers of DHPopup instead regarding this issue.
DHPopup support page