Umbraco 10, picture turns purple after beeing processed

Questions
1

Hello,
I have a weird bug that my picture turns into a different color after it got processed through imageprocessor i guess. When uploading it, it has the normal color an everything looks alright, but displaying it or even in a media picker it has a different color:
Original Picture

enter image description here
enter image description here1136×704 399 KB

Purple Picture

enter image description here
enter image description here460×243 29.1 KB

enter image description here
enter image description here756×621 334 KB

enter image description here
enter image description here713×276 166 KB

Please help me, it is a really critical bug.

This is a companion discussion topic for the original entry at https://our.umbraco.com/forum/110004-umbraco-10-picture-turns-purple-after-beeing-processed