Hey, so I need some advice on what to do with my Monstera adansonii.

Hey, so I need some advice on what to do with my Monstera adansonii.
Recently she has started producing these bleached leaves and I'm wondering what's causing it.
She's growing on an east facing windowsill, the temperature ranges between 20°C at night and 30°C in the morning, I try to keep the humidity above 60%, but it does sometimes go down to as low as 40%. I fertilize with every watering with Compo Complete (NPK 6-4-6).
Despite the bleached leaves she's growing fast and is increasing in leaf size.
I'm guessing what's causing this is either excess light or nitrogen deficiency. I have purchased a different fertilizer with a higher nitrogen content (NPK 9-3-6) and I'm going to see if using it will resolve the issue. I'm also considering purchasing a silica suplement because I've read that it can allow plants to handle more light and darken their leaves.
I'm wondering what are your thoughts on the matter.
Also I'd be grateful if you could tell me what variety or subspecies of M. adansonii this is.