When the smart zone is disabled, the system will strictly follow the user program to water the zones. There is no intelligence here. Netro will not skip your schedules when there is rain. Could you please go to Settings->Zones->Smart Zone to check if the smart zone is turned on?
For more information about Netro smart watering, here is an article about Netro three watering modes which might be helpful. https://netrohome.com/forum/posts/111