Downloading an image with the little button next to filename sometimes saves two copies, one corrupted

[lplp6lkhp]

Step 1: Save the image with this button, which keeps the original filename. It looks fine when you're saving it, but...

It sometimes saves like this. I can't figure out what makes this happen, sometimes it saves just fine. I can delete these two files, try saving this same file again, and it saves without any issue.
This also happens with the "Download Link: Add a download with original filename link to the menu." menu setting.

[Hyperbus02]

Same thing for me on video, but there's no "good" copy. Webm's saved this way are broken and dont even have thumbnails