I’m happy to check.
The following are summaries, not proper translations:
Dharmaguptaka pc6:
The group of 6 bhikkhus recited the Buddha’s suttas together with householders in the dhamma hall. They spoke very loudly, like brahmins reciting their books. It disturbed the meditators …
Mahasanghika pc6:
A sangha official taught many youths to recite the parayana “phrase by phrase” (句句). A brahmin wanted to go forth, passed by, and saw it. Since the teacher sat with the students, he didn’t know which one was the teacher and which the students, and he felt unreverential. He ended up not meeting the Buddha, went back home and didn’t go forth.
I’ll post the rest of the origin stories later.