Maybe this quick script in Macro Window helps:
# List Corner Components in Incompatible Glyphs:
for g in [g for g in Font.glyphs if len(g.layers[0].paths)>0 and not g.mastersCompatible]:
print
print g.name
for l in [l for l in g.layers if l.layerId == l.associatedMasterId]:
print ", ".join( [h.name for h in l.hints] ), "---", l.name