Priority of painted lines

Hi,
Can anyone explain why it isnt possible to prioritice painted lines or hatched areas?
At my airport there are hatched areas around the jetway stands with an unhatched square where the jetway wheels stands. My fort try was to add a Overall hatched area, covered with a new apron square above that hatch. But it isnt working, just painted the lines on the second apron (they have priorities)
Any other Solution, than painting all the hatches manually?
Are there any plans to integrate Priority for other things than Aprons for example?
BR

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