Unearth + Contagion - Constructs do not spread contagion effects

When Contagion is spread via the minion constructs created from Unearth, it does not apply support gem properties from the original contagion spell. I'm unsure if this is intended behavior or not, so thought it worthy of a bug report.

To be more specific, support gems that can be used with contagion such as hinder & chaotic freeze are not applied when contagion is spread via Unearth constructs. You also cannot use these support gems with Unearth itself.

I confirm this bug.