Many users have reported issues with Primal. You can try another client. It looks like you're using Android, right? Give Amethyst a try. Both clients are good, pros and cons for each exist. Amethyst is my #1 though.
Discussion
I just switched from amethyst to Primal. amethyst wasn't loading notes properly. so far Primal has been way better in my opinion. threads are easier to read, and I was even able to figure out how to put up a profile picture, lol