Bug Report

The Astral Sorcery update added Dynamism gems which are crafted by soaking a rock crystal and glowstone dust in liquid starlight (same as the celestial crystal recipe with stardust). The glowstone dust floats though so you have to quickly place a block to force it to stay in the liquid starlight long enough to craft.

Possible Solution

Make glowstone dust not float same as stardust.

Unfortunately we are unable to change the behaviour of glowstone specifically at this time.

The reason stardust behaves differently is because it isn't technically an ItemEntity - it is a custom ItemCraftingComponent - so it doesn't get switched for a realistic item drop. Glowstone is just an ordinary item, so it does.