Blazes, endermen, and striders are not dropping XP when killed by splash water bottle

Steps to Reproduce:

1. Spawn a blaze, enderman, and strider
2. Kill them using a splash water bottle

Observed Results:
They do not drop any experience.

Expected Results:
They should drop experience.

---

Original Description:
I wanted to make a an endermen XP farm using splash water bottles to kill them but for some reason they weren't dropping any XP orbs.