Well, this sucks. USPS uses Quick Chip now (and still doesn't support contactless). There goes a cheap way of trying to push PIN changes to a card with offline PIN.
(I'm still trying to get my Treecard to accept the new PIN I set and reset the PIN Try Counter for the global AID. At least the new PIN does work if the merchant uses the common AID and/or if I tap, I guess?)
BTW, the Taco Bell manned counters still have issues with online PIN when inserting. While TB fortunately still doesn't seem to use Quick Chip, it also doesn't seem to try to run any issuer scripts afterward if a PIN isn't entered. I don't know if that's a Treecard thing or if Taco Bell's processor simply doesn't support scripting.