Hey Andrew,
Welcome to the forums and sorry to hear about the issue. It does indeed sound like a theme conflict to me. I’d probably start by right-clicking my mouse and opening “Inspect” – from there you can see any errors in the console. You could also enable wp_debug in your wp-config.php file and see if any errors display on the page giving you troubles.
I wish I was able to provide more assistance as to how to resolve the conflict, but these types of support requests are outside the scope we’re able to cover. I’d still be happy to try and narrow down the conflict, so let me know if my first recommendations work and if not, we’ll continue troubleshooting.
You may also want to reach out to your theme author to see if they have any insight. Have a good upcoming weekend and thanks for choosing PRO!