It feels like half the time the default camera app will not work.
In reality it is the first time you press to take a picture it does not, instead it does a loading circle on the camera button and then nothing. The next time you try to take a picture it will do so normally, usually at least. It has happened at least once before that the loading no picture thing happened a few times in a row.
For reference the settings i use are 48MP, non wide angle, in "photo" mode