Hand of Chayula: Does not list correctly for support gems

Hand of Chayula shows several curse related support gems (See Decaying Hex) as unslottable that can actually be slotted

I think this goes for all meta gems (or at least for invocations) as well:

If you try to socket a finished support gem (which supports spells/curses) manually into the slots of the meta gem, the socket will only accept the support gem if there is already a fitting spell/curse gem in another slot of that meta gem.

But if you choose a support gem via the gemcutting menu and have the respective meta skill gem marked for filtering of fitting support gems, the abovementioned support gems (ones that only work if there are certain spells socketed into the meta gem) will always be shown as not-working, which can be very confusing.