Hvorfor er kantene på bildene mørkere når de tas i live-modus?

Gjeldende produkter： 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 Y9s(huawei p smart pro dual sim card 6gb+128gb)，HUAWEI P smart Pro，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