Update CHANGELOG.md for #39498

CHANGELOG.md

@@ -40,6 +40,7 @@ BUG FIXES:
 * resource/aws_lb_listener: Remove the limitation preventing setting both default_action.0.target_group_arn and default_action.0.forward to align with the AWS API which allows you to specify both a target group list and a top-level target group ARN if the ARNs match ([#39413](https://github.com/hashicorp/terraform-provider-aws/issues/39413))
 * resource/aws_lb_listener_rule: Fix several of the arguments to avoiding setting zero-values in situations where they shouldn't causing warnings and import differences ([#39413](https://github.com/hashicorp/terraform-provider-aws/issues/39413))
 * resource/aws_lb_target_group: Fix several of the arguments to avoiding setting zero-values in situations where they shouldn't causing warnings and import differences ([#39413](https://github.com/hashicorp/terraform-provider-aws/issues/39413))
+* resource/aws_medialive_multiplex: Fix to properly handle read failures during delete operations which were previously ignored ([#39498](https://github.com/hashicorp/terraform-provider-aws/issues/39498))
 * resource/aws_opensearchserverless_vpc_endpoint: Change `name` and `vpc_id` to [ForceNew](https://developer.hashicorp.com/terraform/plugin/sdkv2/schemas/schema-behaviors#forcenew) ([#39454](https://github.com/hashicorp/terraform-provider-aws/issues/39454))
 * resource/aws_opensearchserverless_vpc_endpoint: Correctly set `security_group_ids`. This requires a call to the EC2 `DescribeVpcEndpoints` API ([#39454](https://github.com/hashicorp/terraform-provider-aws/issues/39454))
 * resource/aws_rds_cluster_role_association: Fix intermittent failure when cluster is not in an available state ([#39457](https://github.com/hashicorp/terraform-provider-aws/issues/39457))