Dynamic multicast in AWS not working using IGMPv2

I have a java application running on tomcat on multiple ec2 instances, and I want to deploy it in cluster mode which is working when I configure in each tomcat server a StaticMembershipInterceptor for the other instances. But this is not a viable solution since I want to use auto scaling, and I don't want to modify each time the server.xml

So I try to use McastService on ip address 224.0.0.4 to run a multicast address, and have the same configuration on all instances, I also configured on my VPC the following

a transit Gateway with the attribute Multicast support Enabled
a transit gateway attachement linked to my VPC and my 2 private subnets
a transit gateway multicast domain with IGMPv2 support enabled, and associated to my subnets using the TG attachement
on the security group of my instances I've enabled all traffic between the local network

on my ec2 instances I disabled the check source/Dest and forced IGMP to version 2, but I still can't get multicasting working, I try to ping the multicast address but all packets are lost.

Is there another configuration I'm missing ? Thanks

Solution

I was missing the part where my instances should be nitro to allow this, I switched from t2.micro to t3.micro and it worked