[Paraview] Bug in XDMF reader ?

[houssen]

Hello,

I have 2 grids (sharing the same nodes). On ParaView-5.0.0, when 
attribute names differ in grids, data can not be visualized : is this 
intended ? If yes why ? If no, how to file a bug ?

Thanks,

Franck

~> diff OK.xdmf KO.xdmf
48c48
<       <Attribute Name="NodeValues" AttributeType="Scalar" 
Center="Node">
---
>       <Attribute Name="NodeVal" AttributeType="Scalar" Center="Node">
52c52
<       <Attribute Name="CellValues" AttributeType="Scalar" 
Center="Cell">
---
>       <Attribute Name="CellVal" AttributeType="Scalar" Center="Cell">
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