Explanatory dictionary bubbles hidden by sidebars

Hi, I want to use the Explanatory Dictionary plugin and I’m using the Suffusion theme 4.4.7. Unfortunately, the tooltips don’t work well. If the expression to be explained is positioned near the upper or the right sidebar, the bubble gets hidden as if under the sidebar.
You can see it here – try the word “feferonky” at the bottom or anything near the right sidebar.
Can anyone help me? I’ve been googling and trying things a lot, but no result.