Category talk:83Plus:Quirks
From WikiTI
"The calculator will crash if PC is greater than or equal to C000, provided an even-numbered RAM page is swapped in the upper bank. This is the default (page 80h). This is where the 8kb limit comes from "
This is not a "quirk" but a relatively well documented hardware constraint known as memory (execution) protection.
I don't know that "quirk" is well defined. I intended it to be something that was useful for a programmer to know about, but that didn't really fit anywhere else.