I’m not even sure if this is entirely a bug, but with “Elemental Starfield” allocated both Runic Invocation and the triggered Elemental Novae cast centered at the same location.
If you allocate Enigma however, the Elemental Novae are cast at the new mouse targeted location post-blink.
For a rough example
C = Character
RI = Runic Invocation cast location
EN = Elemental Nova cast location
Without “Enigma” allocated:
C-----------RI/EN-----------
With “Enigma” allocated
C-----------RI------------EN