Inconsistent recentering around arbitrary point

[Vasilii Kolobkov]

Hello Emacs folks!

I'm trying to display a file at particular position along my current
window like this:

(let ((file "~/somewaht-big.org")
      (pos 10000))
  (with-selected-window
      (display-buffer (find-file-noselect file))
    (goto-char pos)
    (recenter)))

Yet i don't get consistent results.  E.g. if i have a buffer visiting
that file burried, then i'm likely to get point set before the expected
value.  That doesn't happen if i try it on large plain text files.

What am i missing here?