Constexpr is not imported when declared within a namespace

Development C++ interoperability
1

When a constexpr appears inside a namespace it does not get exported to Swift, but when it is declared outside any namespaces, it is available.

For example

namespace namespace_test{
constexpr int TEST = 44;
}
constexpr TEST = 44;

TEST will be visible in Swift, but trying to use namespace_test.TEST will end up with Type 'namespace_test' has no member 'TEST' error.

Since it seems like a bug I've opened an issue, but I'd like to ask about it here, just in case: Is it indeed a bug, or was this the intended (or necessary) behaviour for some reason?