Subscription notification received twice in portal inbox

Hi,

I have created a subscription in a folder .

Selected the receipient as a user group "abcgroup"

Notification on "Every Change"

Frequency as "On Every Event"

On this folder teh approval process is also set

I have set teh channel as '"None" since I want teh notification sent only to uwl

teh issue is that I do receice the notification in inbox but the notification are sent twice

Also for folder in which the approval process is not set , I receive two notifications ,

and one of them is from subscription_service.

Can sombdy please suggest a possibly solution , I want only one notification