Mea culpa on this. Pima is the only account that wants to stop on write-ins that I am aware of. A better proceedure is to pre-sort the write-ins as the envelopes are opened. Central count performs very badly when it starts and stops -- the feeder was designed to stream. That said, Pima would prefer to start and stop, or at least that was the case a couple of years back. I made a special release for them back then, but it needs to be an AV setup option.
If I can add the option cleanly in 1.11, I will, otherwise it will have to be in the next 1.16. Rattle my chain on Friday if you don't see anything by then.