Security group rules get added then removed

[hashibot]

This issue was originally opened by @tomstachura as hashicorp/terraform#10100. It was migrated here as part of the provider split. The original body of the issue is below.

---

This snippet:
resource "aws_security_group_rule" "admin" {
type = "ingress"
from_port = "${var.admin_ports[count.index]}"
to_port = "${var.admin_ports[count.index]}"
protocol = "tcp"
security_group_id = "${aws_security_group.admin.id}"
cidr_blocks = ["${var.admin_ips[count.index]}/32"]

count = "${length(var.admin_ips)}"
}

will create the 4 IPs and Ports configured when I run apply, however if I run apply again, they get removed. Then, if I run apply again, they get added, and so on.
I would of course expect that they get added and don't change.

[github-actions]

Marking this issue as stale due to inactivity. This helps our maintainers find and focus on the active issues. If this issue receives no comments in the next 30 days it will automatically be closed. Maintainers can also remove the stale label.

If this issue was automatically closed and you feel this issue should be reopened, we encourage creating a new issue linking back to this one for added context. Thank you!

[RichiCoder1]

This is still happening as of terraform v0.12 and AWS provider v2.57.0

[github-actions]

Marking this issue as stale due to inactivity. This helps our maintainers find and focus on the active issues. If this issue receives no comments in the next 30 days it will automatically be closed. Maintainers can also remove the stale label.

If this issue was automatically closed and you feel this issue should be reopened, we encourage creating a new issue linking back to this one for added context. Thank you!

[github-actions]

I'm going to lock this issue because it has been closed for 30 days ⏳. This helps our maintainers find and focus on the active issues.
If you have found a problem that seems similar to this, please open a new issue and complete the issue template so we can capture all the details necessary to investigate further.