[Feedback] Type Conflict Error in NXG class

[Tepig]

I'm sorry but I cannot share my source code here.

(If NI employee is interested in, I can share it but please don't publish.)

Yesterday, I completed my development on LabVIEW NXG with LabVIEW class.

My test code worked fine and I closed LabVIEW NXG with satisfaction.

Today I launched the project but LabVIEW displayed "Type Conflict" Error on my test code... 

I thought "Oh, did I make some mistakes?" But please see following behavior.

I tried to create class constant on Discard Instance.gvi but it refused to be created.

It said above error message. Oh no...

Of course I can easily resolve this problem, delete and re-create the VI.

But actually, I saw this behavior on two different projects. In previous, multiple gvi showed this so,

I discarded the project and created current project. But again... : ( My heart broke off.

I don't ask "Solution", but this is a kind of "Feedback". LabVIEW NXG isn't stable in some case.

I hope this would be improved by next version.

[Env]

Windows10 64bit English

LabVIEW NXG 4.0.0

Build number 7.1.0.50148