I have figured out what the case is with splitting enemies that split into other splitting enemies. In the case of split on hit, if it splits into more than one enemy that splits on hit, then only the first one splits into whatever it is set to split into to. If it splits into one, then the enemy that it splits into would not split at all. However, if it splits on death and it splits into something that splits on hit, the the first enemy would split immediately, even if the quantity is set to 1.
On the other hand, if it splits into something that splits on death, the off-springs do not split at all, regardless of whether the parent enemy splits on hit or splits on death. However, this behavior is perfectly normal and has nothing to do with the problem with enemies that split into something that splits on hit.
BTW, the change log does not mention anything about this.
I love the title (that's a reference to something... X-ing Y's that X into X-ing Y's... can't put my finger on it right now though).
However, the description leaves me confused. Perhaps you could make a table of possibilities?
Something like this:
Parent split on hit.....1 child.......Child splits on hit.......what happens?
Parent split on hit.....2+ children...Children split on death...what happens?
Parent split on death...1 child.......Child splits on hit.......what happens?
Parent split on death...2+ children...Children split on death...what happens?
I don't mean this as rudeness, I'm genuinely confused by it and wanted to clarify so I can help confirm and test if it is fixed.
Would this clear things up?
Parent split on hit.....1 child.......Child splits on hit.......Child does not split when spawned.
Parent split on hit.....2+ children.......Child splits on hit.......First child splits when spawned.
Parent split on hit.....1 child.......Child splits on death.......Child does not split when spawned.
Parent split on hit.....2+ children...Children split on death...Children do not split when spawned.
Parent split on death...1 child.......Child splits on hit.......Child splits when spawned.
Parent split on death...2+ children.......Child splits on hit.......First child splits when spawned.
Parent split on death...1 child.......Child splits on death.......Child does not split when spawned.
Parent split on death...2+ children...Children split on death...Children do not split when spawned.
And this bug still occurs in build 1313