Items in item frame disspaeraing and boats and minecarts not dropping

I have an issue where items will never drop from an item farm and boats and minecarts will not as well,this used to happen before i downloaded the plugins,pls help

just did that,did not solve the problem,and then reinstalled the plugins,still nothing,i am pretty certain it is not the plugins as my friend uses the exact same in his server

Quote from Roman

Remove the plugins again?