The resident paid. What happens?
The case closes on its own, from whatever stage it had reached, and everybody is told. In most states paying everything owed ends a nonpayment case as of right, and in several that right lasts until the moment of the lockout.
From the guide When Rent Has Failed: Navigating an Eviction.
A cure ends it, at any stage
The moment the arrears reaches zero, the case closes, whatever stage it had reached, and the steps freeze. Several states give a statutory right to pay and stay right up to the moment of the lockout. If a payment plan is signed while a case is open, the case closes too — the charges it was about are covered by the arrangement. If the plan later defaults, Seayora restores the original charges and a new case can be opened then.
Read the whole guide: When Rent Has Failed: Navigating an Eviction