(LR Android) Photos aren't visible in "all photos" tab.

Hello folks,

I'm not able to see the photos the next day if i open it. I'm able to see the border of segmentation as you can see.

The thing is i add dng, jpg it shows if I check the same day but if i go and check it the next day or some other day this is what i see. I mean i have to open each image to see which is what, can't see the preview.

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