Notifications API with new PAT token after refresh

Hi.

I have an issue with notification scope that disappear after refresh token.

I followed this post, to create a SmartApp, get access_token and renew it every 24 hours : SmartThings API Help - #2 by orangebucket

Worked fine with this scope r:hubs:* r:locations:* r:rules:* r:scenes:* x:devices:* w:rules:* w:locations:* w:devices:* r:devices:* x:locations:* x:scenes:*
But I want to catch notifications (endpoint /notification).
So, I add x:notifications:* into the scope when I create the first access_token with endpoint /oauth/token and grant_type: authorization_code, the scope that I get in response is : r:devices:$,r:devices:*,r:hubs:*,r:locations:*,r:rules:*,r:scenes:*,w:devices:$,w:devices:*,w:locations:*,w:rules:*,x:devices:$,x:devices:*,x:locations:*,x:notifications:*,x:scenes:*
Works fine, now. Nice.

But after renewing the access_token with refresh_token (24 hours later), I now have this response in /notification endpoint : 401 RESPONSE : <html> <head><title>401 Authorization Required</title></head> <body> <center><h1>401 Authorization Required</h1></center>
The scope received from the refresh token response is now : r:hubs:* r:locations:* r:rules:* r:scenes:* x:devices:* w:rules:* w:locations:* w:devices:* r:devices:* x:locations:* x:scenes:*
Missing notification…
Every other endpoint work fine with this new access_token.

Is this a bug, or did I missed something?