u/Fun-Mushroom-4835

Any ideas on what this is on my philodendron? I’ve no clue

It’s definitely damage on the leaf as it doesn’t wipe off but it’s only on these two - the rest of the plant is healthy!

I can’t see any signs of pests so don’t think it’s that

Indoors, about a meter from a window & watered when top 2 inches are dry