[BugReprot] Dereferencing the TSoftClassPtr sometimes returns NULL

Just look at this: Screen capture - 4dd19650c57339b2455e2a470efde1d1 - Gyazo

I tried to resolve the blueprint class that contains in TSet of TSoftClassPtr and all resolved sucessfully, but dereferiencing the some element returns the nullptr.

But if I open this blueprint (this element class) in editor, the next try gives success…

What’s wrong with it?