I'm running MDL 3.31 with the Boost theme. I've entered html directly in the description field for one of my course categories, which consists of three (3) Bootstrap 4 Accordion blocks.
Everything works as expected outside of Mdl (i.e. when the page is served via it's URL - www.domain.com/filename.html) but when when I click the accordion buttons on the version running in Mdl the "collapsible" behavior doesn't work as expected. The native behavior for the component is when a button is clicked any other open cards in that accordion set collapse so only one card is open at a time. In Mdl, open cards don't collapse when subsequent buttons are clicked.
Am I correct to assume the code should word the same in Mdl as it does on a regular html page or is that not the case?