So Much Luck IM SO HAPPY!

[Kiryuu]

Now we'll see your luck with the 20% chance... Also, as a reminder, HA from Male parent only pass via Duplicat breeding... :v

For canon games, yeah afaik HA from males only passes via ditto.
In uranium however, that 20% seems to work on passing via non duplicat.
Here is a quick sample I did for proving grounds:
Parents:

Spoiler

And Offspring:

Spoiler

That now leads to the question. Is it a bug? A feature? or an overlook by the developers?

Edit: If you're asking on why I didn't report it way back, that's because I didn't notice the bug(?) until just recently. @GreenCross(probably doesn't have an account in the forums) seem to have bred a HA unymph despite not having the HA on Female Unymph but the HA on Hagoop Father which then leads him into confusion on how that have happened