display error for grayscale png file

[pingplug]

version: 6.27.2 from f-droid system: HarmonyOS 3.0.0

the original png file:

in the thumbnail, the dispaly is normal:

when I first (or after clearing cache) opened this file, the display is fully black. when I opened it later it looks like this:

ps: the display in the system gallery is normal