nightmix,
Thanks for getting in touch! While I wish I could say that the plugin seamlessly integrates with every other third party plugin out there, the reality is that there are so many that it would be nearly impossible for us to account for all of them.
If this is something you’d like to see in a future release, I would suggest submitting it as an idea on our UserVoice page. Our team periodically reviews the most popular ideas for possible inclusion in a future release of the plugin.
Finally, if having Additional Fields is crucial to your site, then I would recommend using the built-in functionality provided by the PRO plugin (Events->Settings->Additional Fields), as this is supported by the Community Add-on and will work without any customization needed.
I hope that helps to point you in the right direction, but please let me know if you have further questions. Thanks! 🙂
-Casey-