the penny shortage (USA)

so most customers are chill about the fact that we physically do not get pennies from the bank to put in the drawers anymore bc of the nationwide penny shortage. however, certain people are the exact opposite of chill...

exhibit a:

*working window*

me: hi, that will be $1.58

customer: okay *hands me a 5*

change is $3.42 and per our rounding policy which is posted on the window, i give her $3.40

customer: where's my pennies?

me: so i don't have any pennies in the drawer to give you, and i gave you 40 cents in change instead of 42 because of our rounding policy.

customer: okay, whatever *with a diabolical amount of sass*

i gave her the coffees she ordered and she drove off, then came back a couple days later with the same order. she gives me exact cash and proceeds to say word for word: "i gave you exact change because you shorted me last time" dawg i simply followed policy idk what to tell you 😭🙏

exhibit b, from today:

*working window*

me: hi, that'll be $19.67

customer: *hands me a 20*

again, per our policy i gave him 35 cents instead of 33. MORE than he would get with pennies.

customer: *looks at change, then looks back at me* you guys don't use pennies anymore?

me: because of the penny shortage, i rounded your change up. you gave me a 20, and your total was 19.67, meaning your exact change was 33 cents, and i gave you 35.

no response given. like why are we mad over getting more change.

keep in mind, there is literally a sign on the window explaining the whole thing and there has been for months.

what has your experience been like with the shortage?