From the issues created in this repo, the lack of responsiveness from the Cognito team which keep issues not being acknowledged, the state of the code for all the SDKs related to Cognito, and the incoherent mess that this SDK are in, and the private chats that I had with AWS Teach Support I understand the problem that the Cognito service has.
There is nobody responsible for the Cognito project which explains the state of Cognito.
To give you some perspective, when on Github for the Kinesis Video Stream services I mentioned about some issues within 1 day the manager for the project got in touch with me, and called me to have a chat - and the complaint was marginal compared to what's happening with Cognito.
I see that there is no future for Cognito, and from now on, I'll start to transition my clients to a custom solution that I have control over, and what I build will just work.
I'm truly disappointed that nobody at AWS can be held accountable for Cognito, and there is no way for someone from the outside to point to the problem. The consequence of this are reflected in the product itself.
To sum it up, my feature request is this: I hope this level of incompetence won't spread to other AWS services.