Killing my server without letting it gracefully shut down seems to cause large shadows to be generated around where my player was last and there seems to be no way to get rid of them. The shadows are light level 0 and allow large numbers of mobs to generate during the day.

What I expected to happen was...:
No shadows covering the landscape.

What actually happened was...:
Large shadows covering the landscape.

Steps to Reproduce:
1. Download the 1.14 pre release 2 server
2. Start the server and agree to EULA
3. Start server again. (I used CMD and the following: java -Xmx1024M -Xms1024M -jar server.jar nogui)
4. Log in using 1.14 pre2 client. Run around letting chunks generate.
5. Disconnect.
6. Type "stop" in cmd and let the server save and shut down properly.
7. Start the server again.
8. Run to a new area. Look around letting chunks around you generate.
9. Disconnect.
10. Kill the server by either closing CMD or hitting CTRL+C.
11. Start server again.
12. Log in again and see large shadows producing hoards of angry mobs. (Note: it seems to generate them just locally around the player. Running a short distance you won't see a more.)
13. Log out and back in again to see the same shadows.
14. Restart server and log in to see the same shadows.
15. Try steps 4 - 12 again and see it happen in new areas.