This card will cause a soft lock when you cast an enchantment/aura that converts gems, which destroy the support before its constellation effect can resolve. It seems that if it is destroyed, a trigger goes on the stack, but the card is destroyed before it resolves so the is nothing for the trigger to reference anymore.
This can be reproduced by using Eidolon of Blossoms and a deck with a lot of enchantments and auras.
I also believe I have seen this soft lock happen with other constellation cards, although I don’t have any examples.