@RegDC, mine still works outside of Jewel-Osco and still doesn't work inside Jewel-Osco. If you are having problems everywhere, it's likely your phone or your set up.
Meanwhile, I spoke to two different cashiers over the weekend and got two different un-helpful responses:
1) Cashier 1 said she's known the problem has been there for a while and she just assumed it was a problem everywhere. Note that she does not use Apple Pay herself and she did not have an actual example from outside her store. So I can see why more employees in Jewel might not jump on this issue, if they think it's not Jewel. Trust me, it's just Jewel.
2) Cashier 2 smugly told me that his Samsung Pay watch is working, so it must not be an issue. Well, okay then!