Guided Development and Page Map Will Not Load - a.Label.replace is not a function

[Silva_Marcos]

Hello.

I'm facing an issue in a Fiori Elements app that seems to be related with labels assigned through a path.

I defined some sections (UI.ReferenceFacet) in the annotations.xml file and assigned the label from a field that was available, for example:

<Record Type="UI.ReferenceFacet">
    <PropertyValue Property="Label" Path="SubTab01_Name" />
    <PropertyValue Property="Target" AnnotationPath="TabToTable01/@UI.LineItem"/>
    <Annotation Term="UI.Hidden" Path="Hide_SubTab01"/>
</Record>

Some facts:

1. The assignment does work and I see the correct title for the section. (1)
2. If the Label property is there, none of those tools will work. I will get a "TypeError: a.Label.replace is not a function" in the output tab. (2)
3. The moment I remove that Label line, the error is gone and the tools are back on.
4. The number of sections don't seem to influence anything.

(1)

(2)

What could it be?

Thanks, Marcos.