Kubota Kommander z124 ztr starts when it wants to.

Machine is 4yrs old with 123 hrs on it and right now at my wits end. Has anyone had starting problems with this model meaning after mowing for a hour shutting it off and trying to start it again, turn key, no crank, nothing. Let it sit out in lawn till the next day, turn key, starts fine. This has happened few times already and has a few dealer visits already with no resolve. If anyone has any insight it would be greatly appreciated. I'd like to go buy a magic eight ball for this damn machine, shake it, will it start today, yes/ no, will it start up after shutting it off, yes/no/ maybe.Thanks .