This mainly concerns what's known as the cutscene pointer. When executing a wrong warp, the cutscene pointer will often be a dangling pointer, meaning that it points to memory which is no longer in use, or is now used by something else. This affects the behavior of wrong warps, because the cutscene data will now have been replaced by garbage.
The Practice ROM does not save unused memory in states, and this can have some unexpected side effects when loading a state that had a dangling pointer. The pointer itself will have the same value, and be exactly the same. However, the memory that the pointer points to may not necessarily be exactly the same. Specifically, if the cutscene pointer pointed to garbage, the only guarantee is that it will still point to garbage, not the exact same garbage. Because of this, the behavior of wrong warps is not guaranteed.