How to upload animated webp files?
ImagickException: data encoding scheme is not supported `/var/www/html/storage/runtime/temp/P0LY_Test60a2e191a91de2.16978634.webp' @ error/webp.c/ReadWEBPImage/338 in /var/www/html/vendor/pixelandtonic/imagine/src/Imagick/Imagine.php:69

Based on that error, it definitely seems like an Imagick bug or Imagick configuration issue.
https://github.com/ImageMagick/ImageMagick/issues/22
https://github.com/gographics/imagick/issues/181
I don't understand most of that (sounds like you might have a webp image that is using some extended features that Imagick doesn't know about), but hopefully it points you in the right direction.