When we try to remove a key using a cursor that was positioned in a previous transaction, we hit an assertion failure in layered cursors on a follower, while it still works fine for ASC cursors. The minimal reproducer is:

        c.set_key(1)
        self.assertEqual(c.search(), 0)
        s.begin_transaction()
        c.remove()
        s.commit_transaction('commit_timestamp=' + self.timestamp_str(2))