Cubase 8.5 Custom chord symbols don't show up

Cubase 8.5 Custom chord symbols don’t show up.
Bit lost here.
Defined my custom chords in the preferences. But can someone tell me how to make them show up in chord track as well as score editor? Still keeps showing the Cubase-dialect. What am I missing? (see attachment)

chords.png

2nd thought: This this only seems the case with this specific chord (maj7)