Webhook Events of App in Marketplace

Hi monday, I have been having trouble testing this webhooks events in my webhook endpoint:

Screen Shot 2022-10-06 at 14.35.44

I have tested the installs and uninstalls webhooks and they work fine. But I am having problems with subscriptions webhooks, I have tested them with mock app subscriptions but I am not receiving any post request when I create, change or cancel a subscription plan tier. Are this webhooks not working with mock app subscriptions?

Best Regards,

Cesar Anasco.