[valenaut]

Reproduced in Safari on macOS Monterey.

"And. And. And. And." caused no problems.

"And. And. And. And. And. And." also crashes (5 "And."s is a substring, so makes sense).

I cannot imagine how this bug is occurring.

[pmichaud]

My wild-ass guess is a grammar check bug. Since it words on both “and” and “but,” I’m thinking it’s some check related to conjunctions.

[aimor]

I think this is the right track. "However. ", "Therefore. ", "Also. " cause the crash too.