Dent in leaf of phal

[Orchidreamer]

I have the exact same spots on my Phal violacea. I think it's most likely a fungal or bacterial infection that could be caused by water left on the leaves or the lack of air movement.

I applied physan and soaked the plant in thiomyl (systemic fungicide). The spots haven't increased in size. You could try treating with a fungicide. If the spots on your leaves continue spreading, you should cut off the affected area.