Hi,
All the plugins/themes being compatible is the ideal world of WordPress ๐
Even with all the standards that WordPress have that is almost impossible, that are hundreds of new plugins each day.
The problem is when the plugins/themes interact in a specif part of WordPress with different approaches not meaning that anyone is wrong(but it could be).
Did you follow the advice on the tabs of shutting down all plugins and test if that erratic behavior still happens? And also clear the cache after disabling the plugins.
This is the best way to approach your type of problem. If it works with all the plugins disabled we just have to find what plugin is causing it and see if we can solve it or not.
-Rui