At some point between 4.10 and 4.12.6 and persisting to latest version (5.8.2)

Cold snap with the block shapers focus only partly continues spells into its ice shards now, previously it was capable of casting at the impact point of the ice,

Now it still has the visuals of an ongoing spell delay at the location but never casts anything, it will only cast if the delay ends while the ice is inflight or if it hits an entity

after looking through the patch notes in the window when this change occurred it is either unintended or undocumented, the fact that the particle effect still exists also makes me think this is an unintended change, if I am mistaken, I'm curious why it was removed, it was very useful for spreading things mostly evenly over a wider area, like Magelights,