Can not boot into TWRP recovery - Black screen
I found a thread over at xda that helped me solve the issue:
https://forum.xda-developers.com/redmi-note-4/help/strange-problem-black-screen-redmi-note-t3716706/page10
Apparently it is some issue with a certain kind of display and the official TWRP can't handle it correctly. The proposed solution is to download an unofficial TWRP version found here:
https://cloud.mail.ru/public/9bcY/3AeSnww5N

Hope this helps anyone with the same problem.