Incorrect aspect ratio of thumbnails on external drives

Is something not working like it should? Let us know.
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2021-06-16 11:05:44

I don't know if this is a bug or not, but I decided to post it here.
When I place pxd files somewhere on internal drive of Mac, thumbnails in the Finder will be displayed in the correct aspect ratio.
However, if you move the pxd file to an external drive, the aspect ratio is broken (any file will be 1:1).

Please see the attached image.
I created a 2048x1024px image in Pixelmator Pro and saved it as a pxd file.
When I put it on the internal drive, it shows the correct aspect ratio (2:1), but when I move it to an external drive, it becomes 1:1.


Images with incorrect aspect ratios are very unsightly.
If this phenomenon is not specific to my environment, I hope it will be fixed.

MacBook Air (M1, 2020)
macOS Big Sur 11.4
Pixelmator Pro 2.0.8 Junipero
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2021-06-16 11:22:13

I have discovered a bug in this forum with this post.
It seems that line breaks are amplified when a post contains images.
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2021-06-17 14:23:35

Thanks for the report! Interesting. How do you typically save files to the external drive? Via File > Save or File > Export or simply drag and drop the files there?

P.S. The post formatting issue is a known one, we'll see if we can find a way to sort it out.
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2021-06-17 16:56:29

Thanks for the reply.

For each drive, I tried both saving methods (File > Save and File > Export ) and got the same result as in the first post.
Drag and drop recording is here. (You can play it in your browser without a Dropbox account.) ...

The top Finder is the internal drive, and the bottom is the external drive.
When the copy is complete, the thumbnails will be broken or correct.

I further experimented with an empty USB drive.
When the drive was formatted in "MS-DOS (FAT)" or "Mac OS extended (Journaled)", this problem did not occur.
Apparently, this problem only occurs when formatted in "APFS".
As far as I've tried, it didn't seem to matter whether the drive was encrypted or not.