Expose a bug in moto EC2 tag filtering

expose_moto_bug.py

import boto3
import moto


@moto.mock_ec2
def expose():
    ec2 = boto3.resource('ec2')
    blue, green = ec2.create_instances(
        ImageId='ANY_ID', MinCount=2, MaxCount=2)
    ec2.create_tags(Resources=[blue.instance_id],
                    Tags=[{"Key": "environment", "Value": "blue"},
                          {"Key": "application", "Value": "api"},
                          ])
    ec2.create_tags(Resources=[green.instance_id],
                    Tags=[{"Key": "environment", "Value": "green"},
                          {"Key": "application", "Value": "api"},
                          ])
    filter_ = [{'Name': 'tag-key', 'Values': ['application']},
               {'Name': 'tag-value', 'Values': ['api']},
               {'Name': 'tag-key', 'Values': ['environment']},
               {'Name': 'tag-value', 'Values': ['green']},
               ]
    instances = list(ec2.instances.filter(Filters=filter_))
    print(instances)

expose()