Describe the bug
If a group has alert subscriber config added externally, It's not detected on plan, the most horrible part is it removes all configs after applying the config.
Version
Provider : 1.2.0
TF : v1.0.9
To Reproduce
Create a group using terraform, and then modify the group alert setting using UI. Then re-apply the same config.
Expected behavior
Diff of alert config is detected.