Monstera Dubia – Am I overfertilising?

Hi!
Recently, my Monstera Dubia (in semihydro) started getting fenestrated leaves, but they look kinda weird – they’re kinda bright with those dark, contrasting veins.
Am I overfertilising it?

I don’t use nutrient solution for the moss pole – I use always just tap water for it. Nutrient solution goes to the water reservoir only. I fertilise it every week (I fertilise my Alocasias and Monsteras every week; other plants – every second week). I use Advanced Nutrients Micro, Grow, Bloom, proportions 2:3:1 (ml) per liter.
The last photo is of my young Alocasia Batwing, and it gets kinda the same type of discolouration as the monstera.