Now that I understand what you doing, I have a question.
Your layers panel screenshot.
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If you have an artboard that contains a heart.......
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Note: I intentionally left off the layer mask for the heart shape layer because it serves no purpose.
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....and you want to add a gradient to the heart, but the gradient adjustment layer fills the entire artboard....
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How does inverting the gradient adjustment layers-layer mask help? Why add the gradient adjustment layer when the results are exactly the same before you added the gradient layer??
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What purpose does the gradient adjustment layer serve?
If you want it to be within the heat, just clip it!
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Or just add a heart shaped layer mask to the Gradient adjustment layer?
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????????