Autoimport exclude wildcard is ignored

Although the wildcard " NoImport/* " is in the exclude list Unreal still auto-imports new images in there on startup.

I’m on a custom build from 4.13.1-3142249. The customizations don’t involve the asset pipeline as far as I know.

I misunderstood the documentation.
The pattern

NoImport/*

ignores stuff in a folder named “NoImport” located directly in the Content directory. To exclude all “NoImport” folders anywhere in the directory structure one should use the following pattern:

*/NoImport/*