What I expected to happen was...:
Usually, when I turn on peaceful mode in survival, the hostile mobs disappear. For some reason, when I'm playing survival on my realm, peaceful mode isn't peaceful.
What actually happened was...:
Hostile mobs everywhere.
Steps to Reproduce:
1. Play in normal mode for a while on a realm.
2. Switch to peaceful.
3. Notice that mobs are still everywhere.
Please provide some screenshots and/or videos of this issue occurring whilst the F3 debug screen is enabled.