Angraecum hybrid leaf spot

[An_DS]

My Angraecum Lady Lisa-hybrid shows some brownish spots/lines on a leaf. Also the leaf-basis has a brown edge. Roots are doing fine, in fact I should repot it (lots of roots underneath the plastic pot).
It has bloomed last month. It stands on a window-sill, south-east orientated. Due to holidays, it wasn't misted for a month, and there was less air circulation than normal. The leaves also have a silverish, waxy shine and don't fold open easily.
Could the shine be normal and originate from the parents?
Could the spot be fungal?
Should I look for other things?
Could it just be a lack of humidity/air flow?
Thanks for you advice!

[lepetitmartien]

Well… Difficult to tell…

First don't wet the leaves!
Second, it seems at least something on pic #2 is heading from the base to the tip of the leaf.

I'd play fungal, use a systemic, and keep on the dry side with air movement. But maybe a specialist of Angraecum has some input to add.

Keep us updated especially if it evolves, it may be clearer then.