Vanda root tip black

[Rachelk]

Good morning, I am relatively new to orchids. I live in south Florida and I keep all my orchids outside.
I have a Vanda that I just noticed has a root tip that is black. It is potted in a standard orchid mix of fir bark, charcoal and perlite. I water it every morning in the summer and all of its other roots look very healthy with shiny green tips. I fertilize it approximately every two weeks.
I’m thinking maybe the tip has been burned? Either by fertilizer or the sun?
I would like help figuring out what the issue is and how I should proceed. Should I cut the root at the tip? Is it Possibly a fungal infection?