Flipping a block in pcbnew doesn't flip inner layers nor their connected microvias

Selecting a block in pcbnew on a 4+ layer board and pressing F (flip) will flip the components and outer copper layers but not the inner copper layers and microvias (and presumably blind vias also).

i.e. A trace on In1.Cu connected to a trace on F.Cu by a microvia, once flipped you will have a trace on B.Cu, a trace on In1.Cu (should be In2.Cu), and a microvia from F.Cu to In1.Cu (should be from B.Cu to In2.Cu).

An secondary issue is that there is no way to edit the layers for a microvia (again, presumably a blind via too), where as you can manually edit the layer for traces. This means that any bad microvias must be deleted and placed again (not fun with a large BGA package trying to make sure that you haven't missed any).

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Version: 4.0.0-stable release build
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Boost version: 1.54.0
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