I to have this problem!
Leave a reply form works perfectly, why not just code the rest the same?
The current parts that are incompatible are:
The actual comments
You can change any part of wpDiscuz style using wpdiscuz.css file in update-safe way, describe in wpDiscuz template customization documentation.
Here is the doc to how to customize the wpDiscuz style: https://wpdiscuz.com/docs/wpdiscuz-documentation/customization/custom-template-and-style/