So the solution for me ended up not needing the code snippets pro plugin or to add any .css.
It was quite a simple fix actually. My id field looked like this: faq:_answer, which was from my label being FAQ: Answer. Apparently, the colon and the underscore causes an issue like this. I changed the id to faqanswer. No special characters and no spaces and it's fixed! Hope this helps someone else out there!
Question to Meta Box support: does the above info perhaps help you to solve this? I only use underscores as a "special" character in field IDs. I assume that's not causing this as it's common practise.