Thank you for the project. As expected, it works fine on my end. After speaking with other engineers, it seems that more logging will need to be added for us to actually see what is going on here. A report has been put in for adding that logging in particular. Unfortunately this means that we can’t diagnose the problem right now. I would suggest sticking with 4.10 at the moment since it works for you.
Another thing you can try in case it’s your engine installation in particular that is having this problems is to download 4.11.2’s source from Github and build it from that.