AWS Elasticache Memcached NON-STICKY sessions NOT working STICKY sessions are working

I have more than 7 years experience in Linux and 4 years experience in Amazon Web services. Certifications: RHCE Certified. AWS Certified Solution Architect Associate. AWS Experience details: - I am AWS Certified Solutions Architect and RHCE certified with deep expertise in cloud infrastructure, automation, security, highly scalable systems, aws account auditing and implementation of cost-effective solutions with Highly-Available infrastructure. - AWS based projects exp: e-commerce, payment gateway, weather sites. - AWs services exp: EC2, Elastic Beanstalk, S3, glacier, cloudfront, RDS, DynamoDB, ElastiCache, VPC, Route53, CloudWatch, cloudtrail, Opswork, Elasticsearch, SNS, SQS, SES, ECS. - Backup process setup: Logbackup to s3, ec2 database and rds backup on EBS, snapshots, S3. - Setup Build and deployment process into AWS envorinment using Jenkins. - Implemented opensource tools into aws env as per requirement. (e.g. cacti, icinga, nagios, zabbix, Datadog)

I'm an experienced cloud developer with more than 5 years in coding, deploying, troubleshooting and mantaining java web app and softwares in cloud environments (AWS, IBM Bluemix, Azure..)