Give it more time, it will happen.  My 2002 ES300 behaves just fine for a
few weeks after every oil change, because I have them reset the computer
each time.  It takes a little while to "learn" your driving habits, then the
problem kicks in.  It almost seems like before it "learns", it responds to
driver input more aggressively.  Then after it has some history in the
computer, it makes its own decisions for you.  Be patient, it will likely
exhibit the problem at some point.