There is an obvious example with Heidegger.
After Being and Time there is a shift in Heidegger's thinking that he
himself christened ‘the turn’ (die Kehre). ...
At root Heidegger's later philosophy shares the deep concerns of Being
and Time, in that it is driven by the same preoccupation with Being
and our relationship with it that propelled the earlier work. In a
fundamental sense, then, the question of Being remains the question.
However, Being and Time addresses the question of Being via an
investigation of Dasein, the kind of being whose Being is an issue for
it. As we have seen, this investigation takes the form of a
transcendental hermeneutic phenomenology that begins with ordinary
human experience. It is arguable that, in at least one important
sense, it is this philosophical methodology that the later Heidegger
is rejecting when he talks of his abandonment of subjectivity. Of
course, as conceptualized in Being and Time, Dasein is not a Cartesian
subject, so the abandonment of subjectivity is not as simple as a
shift of attention away from Dasein and towards some other route to
Being. Nevertheless the later Heidegger does seem to think that his
earlier focus on Dasein bears the stain of a subjectivity that
ultimately blocks the path to an understanding of Being. This is not
to say that the later thinking turns away altogether from the project
of transcendental hermeneutic phenomenology. The project of
illuminating the a priori conditions on the basis of which entities
show up as intelligible to us is still at the heart of things. What
the later thinking involves is a reorientation of the basic project so
that, as we shall see, the point of departure is no longer a detailed
description of ordinary human experience. (For an analysis of ‘the
turn’ that identifies a number of different senses of the term at work
in Heidegger's thinking, and which in some ways departs from the brief
treatment given here, see Sheehan 2010.)
Sheehan's The Turn: https://www.academia.edu/34868772/THE_TURN_-_ALL_THREE_OF_THEM
Also, Freud considerably changed his thought with Beyond the Pleasure Principle.