Brief flicker of "no image" border around the displayed image

[humky]

I installed HomeGallery using the quick start instructions: https://docs.home-gallery.org/install/index.html#quickstart
waited for a few hours for previews generation. Now when I open the gallery from mobile browser on my phone (using local ip:port), I have these kind of flickers when viewing the images. (attached video). It also happens on desktop (the host machine), but so quickly that you can only sometimes see the white 1 pixel border but without "no image" icon.
I tested in Chrome and Kiwi Browser they behave the same.

document_5195444280943993978.mp4

[xemle]

Hi. Thank you for your time and issue. I wont be able to answer within a short time and plan to answer within the next 7 days.