error Task :app:mergeReleaseResources FAILED (SOLVED)

[gieboyz]

Hi everyone.
i have some issue while following this steps: https://facebook.github.io/react-native/docs/signed-apk-android

after many hour searching the solution still not working for me.
but when i try to trace the problem based on this results

as you can see from result above the problem is where "src_assets_images_placeholder.png".
then after trace the problem i got some clue, the problem is in my resolution image.
as you can see image bellow the "src_assets_images_placeholder.png" is 1880 x 1250

so i try to change resolution to 500 x 300. and it's working

my questions is it's true the resolution should be less 1000x1000px or this is bugs ??

here is my info.

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