Attempted to create a package with a short package name: Function_51 Outer: NullOuter

Development Programming & Scripting
1

The project works in pie and standalone. The packaging log doesn’t indicate any errors or related warnings but the log for the running packaged project has a couple:

LogUObjectGlobals:Warning: Attempted to create a package with a short package name: Function_51 Outer: NullOuter
LogLinker:Warning: Function_51 has an inappropriate outermost, it was probably saved with a deprecated outer.

This Function_51 is mentioned six times and a Function_1410 for another six times.

Binary 4.7.4-2497108. The project is mostly BP but has a single, very simple C++ class too.

EDIT: Clarifications.

2

So the pawn, a data-only BP, does spawn but is invisible because several if not all its default properties are missing: they are not how they were set up in the class but inherit values from the parent class.
As a test I print to log the value of one critical variable (it has the type of a class, purple color, to be spawned). In pie or standalone it has the proper value. In the packaged game it is stuff from the parent.

I’m not sure if or how it is related to the warnings above.