Why do the corners of the photo appear dark when taken in Vivid mode?

Applicable products: HUAWEI P30(single sim card 6gb+128gb、dual sim card 6gb+128gb、dual sim card 8gb+128gb),HUAWEI P30 Pro(single sim card 8gb+256gb、dual sim card 8gb+512gb、single sim card 6gb+128gb、dual sim card 8gb+256gb、single sim card 8gb+128gb、dual sim card 8gb+128gb),PORSCHE DESIGN HUAWEI Mate RS,HUAWEI nova 2(lte 4gb+64gb、4gb+64gb),HUAWEI Mate 30(dual sim card 8gb+256gb、dual sim card 8gb+128gb),HUAWEI P20 Pro(single sim card 6 gb + 128 gb、dual sim card 6 gb + 128 gb),HUAWEI Mate 30 Pro(dual sim card 8gb+256gb、dual sim card 8gb+128gb),HUAWEI Mate 30 Pro 5G(dual sim card 8gb+256gb、dual sim card 8gb+128gb),HUAWEI P20(single sim card 4 gb + 128 gb、dual sim card 4 gb + 128 gb),HUAWEI Mate 9(all nets 4gb+64gb),HUAWEI Mate 10(dual sim card 4 gb (ram) + 64 gb、single sim card 4 gb (ram) + 64 gb),HUAWEI nova 2 Plus(lte 4gb+64gb),HUAWEI P10 Selfie,PORSCHE DESIGN HUAWEI Mate 10(dual sim card 6gb+ 256gb),HUAWEI Mate 20 X (5G)(dual sim card 8gb+256gb),HUAWEI Mate Xs,HUAWEI P40(single sim card 8gb+128gb、dual sim card 8gb+128gb),HUAWEI P40 Pro+(dual sim card 8gb+512gb),HUAWEI Mate 10 Pro(dual sim card 4 gb (ram) + 64 gb (rom) (bla-l29b)、single sim card 6 gb (ram) + 128 gb、dual sim card 6 gb (ram) + 128 gb (rom)),HUAWEI P40 Pro(single sim card 8gb+256gb、dual sim card 8gb+256gb),HUAWEI Mate 10 Pro
Applicable products:
Inquriy result as below, please select
Can't search result, please select again
zoom in pic
Why do the corners of the photo appear dark when taken in Vivid mode?

Cause:

Vivid mode lowers the brightness of the photo's corners to improve overall saturation.

Solution:

Switch back to Standard mode and retake the photo.

Helpful or not?
Thanks for your feedback.