This summary is not the rule. The rule text controls.
If someone posts a bond to get a defendant released, that person (called an obligor or surety) doesn't stay on the hook forever. Once the case requirements tied to the bond are met, the court will release the person who put up the bond from any further responsibility. This means they get their obligation cleared once everything has been handled properly.
If a bond was forfeited (meaning the court decided to take the bond money because the defendant didn't show up or broke the rules) but that forfeiture is later canceled or set aside, the court has the option to release the person who posted the bond. This isn't automatic, but the court can choose to do it.
There's also a way for a surety to get out of their bond early. They can either pay the full cash amount of the bond to the court, or they can bring the defendant back to the court in a timely manner to surrender them. Either action lets the surety end their responsibility for that bond before the case is fully resolved.