Smart Component in 3 Master file error

Glyphs 2.2 on OSX 10.11.2

I have a 3 master setup along the weight axis. I am using a Smart Component namend _part.xxxx with one additional layer. I have defined one property with values 0 and 100 to this layer and assigned it thus to my masters: Light 0 Bold 0 Bold (2) 0 SmartLayer 100

The effect of this is that I can use the interpolation of the SmartLayer with master 3 (bold 2) as expected.

But when opening the smart component settings in the other masters I get an error that looks as if I had not assigned the properties to the layers:

Am I doing something wrong, or is there a bug somewhere in the setup?

Thanks in advance,

Can you send me the .glyphs file? (to support at this domain)