I can think of three NPHC organizations that have had conflict significant enough to land them in the Washington Post or (at the time) major blogs:
Org #1 (two incidents)
https://www.washingtonpost.com/wp-dy...081502589.html
https://www.hbcusports.com/forums/th...eblower.56984/
Org #2:
https://www.huffpost.com/entry/alpha...dit-_n_1376067
Org #3:
https://atlantablackstar.com/2012/07...er-leadership/
Although each issue was contentious, I don't believe any of them to be existential issues.