[NTG-context] font troubles in MkIV

Hi again, as I had to re-setup my computer, I installed all my TeX project fonts in subdirectories of texmf-fonts/fonts/. Most of them are found after one or two forced update runs, strangely not all of them, and ConTeXt won’t load them in the most cases. If I move the same font files to one of the directories in OSFONTDIR, e.g. ~/Library/Fonts, or into the project directory, it works. I don’t see a pattern which fonts are found and which not (except that the only Type 1 font family I tried didn’t work, i.e. only after I installed the TTF version in ~/Libraray/Fonts). I already deleted the luatex cache. Any hints for debugging? (Latest LuaTeX MkIV on macOS 10.14) Best, Hraban