First HR was calling you to discuss your background. Asking you to describe the projects you are doing and some basic information about you. They ask about what is the most challenge when you are doing project. From what HR told, look like I have the qualification to get in the next round but no luck

No feedback after submitting take home project. sort of feel waste of time. If possible at least provides some feedback, so people wont feel too bad for spending hours of coding.