I presently shoot with both a Nikon D5 and Nikon D500. On both cameras I have turned on Focus Point Illumination. Using Back Button Focus the D5 Focus points will stay illuminated the entire time I am tracking a subject (its set for Single point and dynamic area). I like the feature especially when doing BIF photography. My D 500 is different and I am not sure why. The Focus Point will illuminate for a fraction of a second and then disappear. This happens using either BBF or Shutter release. I have cleaned all the contacts with Deoxit have also "rocket blown" the AF sensors with Mirror up, I usually have my Nikkor 500mm, f 5.6, pf attached. I have even changed lenses using both my Nikon 200-500 and my Nikkor 600mm f 4, it did not make a difference. Has anyone experienced this issue with a Nikon D500, if so have you been able to fix the issue. Any feedback would be appreciated.