Firstly, congrats and thanks for RR OS.
I just installed RR OS Nougat 5.8.4 on m HTC One M8. The MHL cable (TV mirroring) does not work any more (it did with the stock Android 6 ROM). In addition, it shows that it is at least getting charged through the MHL cable (no HDMI output though), but it gets confused in that mode, because when I unplug the cable, it still shows that it is charging ! So, definitely something is not working as it should ... Is there anything that I can do? Thanks in advance.