Strange behaviour when mixing "zoom" and "autoscale"

To reproduce this, first try out the "zoom" feature (either "z" or Cmd + {0,1,2}). This works as espected.

But once you use "autoscale" (hit "o" or Cmd + 3), the "zoom" behaviour becames quite undefined. Sometimes nothing happens at all, sometimes Cmd + 0, 1 and 2 produce the same result.

This problems disappear once you hit "autoscale" again.