It seems that the map control does not keep its center when it is resized (I am resizing the grid row on the following hierarchy: grid.row>relativepanel>map ).
The behavior is a bit weird, I am only resizing the height and in all cases resizing the row makes the top of the map going north.
PS: I have only tested that on Android for the moment
Can you attach a repro?
Should be fixed in 2.3.4-pre2, please reopen if you still have a issue after trying that version.