ERC: Label not connected to anything when joining hierarchical buses

Hello everyone,

I have encountered a possible bug in the EEschema ERC. I would like to discuss whether this is a bug or I am doing something wrong.

I created a simplified example to illustrate the problem:


There are two hierarchical sheets, with a hierarchical bus each.
The buses are folded out and the bus members connected together.

The ERC gives me the error “Label not connected to anything” for the Labels ‘BUS2.A’ and ‘BUS2.B’.
How is that possible? The ERC says that BUS10 and BUS2.A are attached together and joined to form a single net. This is what I want to do. Why does the ERC throw an error ?

I have uploaded the example project here

Regards,
Marcel

In addition, here is the ERC output (I was not allowed to include 2 images in the first post)

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