I upgraded to v 5.1.4 this morning and the page that displays my events calendar broke! The page uses a full-width template, but after the upgrade, the right sidebar magically appeared. Also, the calendar disappeared altogether. In its place was only half of the details of one of my events.
I disabled my plugins one-by-one to see if there was a conflict, but to no avail.
I was forced to degrade the version back to 5.1.3 - and now everything works again.