Hey i have a group of stores where i have created a custom app on each of these stores, now after this i have registered some webhooks for these respective stores.
for some reason the Hmac validation keeps failing for some stores, this had happened some time back since i could not figure out the issue i had hardcoded that it would skip the hmac validation for that particular store. after 1-2 weeks this was solved i.e. the hmac validation for that store would not fail.
now the same issue happened to another of my stores, not sure what's happening here.
i also have another app that is a public app with way more store installs that works fine, i have not encountered such random webhook failure for this app. so it seems to be happening only for custom apps