This list is from our experience with using our plugins and themes by thousands of clients. If you notice some strange behavior please inform us also via support ticket.
Generally when you have some issue first you should try to disable all third parity plugins in WordPress dashboard and when you need some specific feature use some plugin from our compatible plugins list.
Plugins to avoid (will break your website or causing incompatibility issues so avoid at all costs):
W3 Total Cache
Compatible plugins (will not break your website):
WP all import
WP all export
User Profile Picture
WP Mail SMTP