Got some unexpected results while test Interfaces and Classes

[ruanqizhen]

I tested this in 2021 Community version.

I created 3 interfaces and 3 classes, the hierarchy is listed in the picture below:

Each of the classes contains only one method, assemble.vi, which simply returns its class name.  Then I created a test VI:

I hoped to see 3 different classes name in the results.  However, it only didn't got the name for ChairWithTableAttached class:

Is this a bug in LabVIEW?  How can I make it work as expected?

Thanks!

[ruanqizhen · Accepted solution]

Ignore this.  I found the problem.  The VI's setting was changed, although I don't remember I've ever made any change.  It got the right value after changing VI setting's back to default.