Mobs no longer drop items or exp when killed by player or environement

After several weeks of playing the original skyblock world on a personal server I created using 1.10.2, mobs hostile or passive no longer drop items or exp when killed by player or environement. I have no explanation for it. I didn't even realize it had happened at first. Nothing had changed on my server settings. I've tried to research this on google but seems no others have experianced this issue. I can't figure out anything that I can do to the server properties to get exp and items to drop once again. I'm at a bit of a loss. Single player worlds work just fine as did this world until just a few days ago.

I've attached the server properties and some log files that were generated about the time the issue occured.

I'm not sure what other files I should attach. Please let me know if you require any other files to investigate this bug.