I would instead use the Click Trigger functionality for this effect:
http://help.webflow.com/lesson/click-trigger-interaction
You’ll see a link to a video of making a show/hide element in the old Webflow UI. But still takes the same steps. 
I use the same approach on this page here:
https://preview.webflow.com/preview/silver-dollar-city-2016-season-passes?preview=e1ffd72baadcd29065678ac2b786b793
Just scroll down to the FAQ section, and go to the interactions panel if you need to follow some steps on creating the expandable sections.
Important aspects:
Overflow: hidden on the parent element (to hide the content within it)
Initial Appearance of the content to show to height of 0px
First click interaction would be to set height to auto of the content you’d like to display
Second click interaction would be to set height back to 0px
I recommend creating nested elements and nested interactions to make one set of interactions to apply to multiple elements
Feel free to reach out with questions.