These may be original thoughts conceived by an individual. If one needs third party verification for ideas read no further.
I see great similarity in childhood tantrums and psychotic breaks. I believe a more warn/mature consciousness may have a negative reaction to large shifts changes in its perceptual comprehension.
There can be a number of causes for that change which may affect duration.
As for childhood psychotic breaks. I believe they are common. The undeveloped consciousness is so malleable that it is just part of perceiving and comprehending the world. As we mature we experience fewer upheavals but we also gather neuroses.
I'm surprised to have my credentials questioned on an anonymous Internet forum.
Either we have different definitions of psychotic break or you're a pretty high outlier. I don't know anyone from my bipolar support group who had a psychotic break before puberty. Most of them haven't had one.
I had bipolar symptoms at age 5 and severe depression at 9, but didn't have a break until I was 26.
I grew up in a dynamic environment with plenty therapy and hospitalizations. There is definitely something on my mother's side. Suffice to say that I have a lifetime of experience. I think about the human side and the philosophical side.
I'm only speaking from life experience and an effort to frame and understand the issues.