do you mean the chunks are not unloading? if so have you checked if any chunk loaders are being used also what java args are you using to start your server as this can play a huge part
I mean that when player disconnects(leaves) server he keeps getting loaded like server didnt detect that he left , so he can be attacked by zombies etc.... if you know what i mean.
I see you are only useing the absolute bear minimum start up args but this should not do what you are discribing only thing that comes to mind is some mod might be responsable a broken plugin or chunk damage
on my modded server , server is not detecting that player left , instead they are keept loaded....
It has to do something with "word" folder , if i delete it than everything will work fine.
I tryed to delete playerdata file. I dont know what to do else.
tnx for help
i removed all chunkloaders while i was testing ,
"java -XX:PermSize=256m -Xmx2048M -jar forge.jar nogui
pause"