Components at weird positions in interpolated styles

Hello everybody,

apologies if this has been brought up before – I couldn’t find it.

I’ve made a font using two masters (regular & black) and interpolated several styles, such as light, bold, etc.
When testing them in Glyphs and also in InDesign, everything looks fine.

But previewing them in “FontBook”, some components of the interpolated styles are placed at weird positions:

Anchors seem to be at the right positions. I also decomposed all the components.
Do you have an idea?

Thanks a lot in advance!

This is probably a font cache problem. Read this please:

That was the problem indeed.
Thanks a lot!