fixes #1130 -- reset event handler on run
fixes #1130 -- reset event handler on run

walterbender/musicblocks,Hrishi1999/musicblocks,eohomegrownapps/musicblocks,eohomegrownapps/musicblocks,walterbender/musicblocks,eohomegrownapps/musicblocks,Hrishi1999/musicblocks,Hrishi1999/musicblocks,walterbender/musicblocks