Terraform-provider-aws: aws_security_group: revoke_rules_on_delete conflict with 'terraform plan'

Version 1.2.0 (released October 31, 2017)

In this version, a new feature was added:
-resource/aws_security_group: Add revoke_rules_on_delete option to force a security

Problem:
-When you import a security group into terraform, the parameter 'revoke_rules_on_delete' is not imported into terraform.tfstate. Let's assume one imported, say:

$ terraform import aws_security_group.sg-1 sg-234xxxx12

-If after importing one runs 'terraform plan' the following change is reported:

$terraform plan
.....
.....
~ aws_security_group.sg-1
revoke_rules_on_delete: "" => "false"

There is no trace of revoke_rules_on_delete in terraform.tfstate.
I tried to specify the value explicitly in the main.tf file with both 'true' and 'false', and even an empty string (""). In all cases the plan is to introduce a change.

(brute force): to validate/test, I manually edited terraform.tfstate and added:

"revoke_rules_on_delete": "false",

then 'terraform plan' passed with 'No changes'

Workaround (until bug is fixed):

For now, I pinned the provider plugin to the previous version, (using which the problem does not manifest), in main.tf:

provider "aws" {
version = "~> 1.1.0"
.....
......
}

So essentially, it looks like 'terraform import' should explicitly import the value of the parameter revoke_rules_on_delete explicitly as 'true' or 'false'