Customer requested a revised invoice to correct address - does it reset the clock?

[Lance]

I chased a late paying customer recently - they responded quickly, which was nice, but have now requested a revised invoice to make the most minor of minor corrections to their address. (Foreign address, so I got it slightly wrong)

I've got a feeling that they're now going to want to process this is another [x] days. Just to nip this in the bud, do they have any rights to do so?

If you correct the address and send the invoice with the same date, then it's the same invoice date. So same payment terms.
As for whether they can delay payment..... What are you going to do if they delay by another [x] days? I presume not a lot so they can do what they want.

Why not ask them as they'll do what they want no matter what?

If you issue a credit against the previous invoice and issue a new invoice then that has a new date.