Using "Quick Export as PNG", exporting in different mask size will result in different colours

after some testing i think it isnt related to the mask but some hidden adjustment settings per folder which stacks.

this can explain why when i duplicate the folders, it gets more purple  further down (the more folders stacked above),

and when i merge the folders towards the top, the colours (right under the merged folder) of the export return to normal.

but it shouldnt happen right? quick export should just be exporting individual folder/layers

I open a new file, drag in only the 3 folders, same wrong colour result
but when i merge them and export, they are of the right colour

I tried to move the folder's ordering, the colour changed again
it seems like the lower the order, the more purple it gets