Hi Richard
It looks like a fresh import. I think it´s all ok with your plant.
Now let the orchid in this substrat and no more stress for it.
Even moistly but never to wet and never dry out completly . And the fun is better for 5 minutes but than every hour.
the fun takes the humidity away .I think your Masdevallia is on a windowsill ?
Than the open window is enough for airing.
Mine are on a windowsill ,westside and no fun ,only the window a little bit open.
And under the potts is a cup with water for humidity.
Hope it helps