I did another quick check and the bounce seems to be sample accurate. But when I bounce and the pan is not at its center position (also with extreme setting, meaning L or R) I can’t get a perfect null. Maybe the cent accuracy (0.00 dB) is not enough? I don’t know, just thinking out loud. But how many variables are involved here in addition to pan and level? I would understand not enough precision from an intermediate pan position, but form an extreme position too?
EDIT: of course I’m doing these tests with a new session, no plugins at all.