Logic Pro triggers random MIDI notes from digital piano

when i open logic pro my midi (digital piano) plays random phantom notes. When i hit keys on my computer keyboard the piano hits differnt random notes. same for when i click mouse. also happens when I plug midi in after opening Logic Pro. I've tried resetting midi, I've tried resetting my digital piano. But it doesn't happen in GarageBand so I suspect it is something going on in Logic Pro. Please help.