trouble starting

More times than not my 2012 raptor starts up just fine. But sometimes when I go to start it, it will crank strong as expected then randomly drop out for a second and then fire right up. Truck runs perfect and has no codes or other issues. Already got a new starter put on it and the mechanic said...

2014 Gen 1 Raptor -- having an issue trying to start. 1st start of the day, no problem -- but when I drive anywhere, park for a bit, then try to start, it will make a weird electrical-clicking sound then a minor "thump" that sounds like it comes from the undercarriage. Almost always starts on...