Why does Directus create huge PNG files for uploaded images?

[candid elk]

Hello, sorry if this has been discussed before.

I'm trying out Directus (self hosted using docker) and mostly loving it.

However, most of the images I upload have derivatives created that are many times the original filesize.

In the screenshot example, I uploaded a 14K webp image. A png copy was made immediately that was about 10x the size. A bit later, another png copy was made that was 70x the size.

I have image transformations restricted to output webp with enlargement disabled so I don't think it's caused by transformation requests.

Maybe they're generated for use in the studio app, but surely this can be done more efficiently. The current behavior massively increases requirements and cost for storage and backups.

[hollow ingot]

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[gusty obsidian]

.webp is a much more compressed and modern format so it makes sense that a large image would be a lot smaller than its counterpart in .png