Simplify Cosh[a] + Sin[a] + Sinh[a]

FullSimplify[Baton[Cosh[Matraque[Cosh[a] + Sinh[a] + Sin[a]]Without return
Exp[a]+ Sin[a]
Is this a bug in Mathematica or am I stupid? Is not this simpler?

I have met him several times, so I guess others have done it too. I therefore have a hard time believing that it's a bug (it should have been reported many times and it's obvious that it appeared during their tests).