It is most definitely the faithful resource pack being incompatible. I had the same issue and it disappeared once I stopped using it. Hopefully there should be an updated one in time.
I know what is causing this. If you use a resource pack from 1.15 it causes this to happen. Once you stop using it the problem stops. Using outdated resource packs causes problems like these.
It is most definitely the faithful resource pack being incompatible. I had the same issue and it disappeared once I stopped using it. Hopefully there should be an updated one in time.