New build is up!
Slim8: Stable version is here!
Despite the problems that are described in the OP, the last two versions can be used without any problem on a daily basis. With this, I close the builds for Oreo and start developing Slim9.
If there are any fixes made by rINanDO in the oreo branch, I will include it in the repository.
Download & changelogs in OP
EDIT: I decided to focus on two projects for Android Pie.
So I shut down the slimroms design for the i9100.
Thanks for the support!