Hi,
I've never seen a 30CH without flyback - and as you guessed correctly there it should be possible to reset without having it stopped before.
The 13ZN (the predecesor) however was also produced in versions without flyback.
If you post a picture of your watch/movement - we could tell you more.
In totally dry/unlubricated condition, it could also be possible the flyback activation isn't possible without excessive force.
In some cases also a poor repair job may cause the flayback setup to be not working.
Sorry for not beeing of more help here.
Best
Suitbert