When using the Easy Post element in Oxygen and selecting the Masonry Preset, you may encounter strange layout behavior. Part of the description or the "Read more" button may appear in another column. You can see this bug only in the Firefox browser.
Don't panic! This is easy to fix, I will now tell you how.
Open the Templates > CSS tab in Easy Posts and add this CSS for the
display: inline-flex; /* instead display: flex */ width: 100%; /* important for some cases, add for reliability */
That's all. Hopefully the Oxygen team will fix this someday.