EDIT: all made in r209 on Win 8.1 64
Here you go
https://dl.dropboxusercontent.com/u/34375299/Construct%202/bugs%20and%20fixes/Load_Tilemap2.capx
I left some stuff just to make things more clearer and easier - "BG" tiled background to visualize the size of the Tilemap you can draw on, Scroll events to let you... Scroll
It goes like this
- run the file
- make the Board (tilemap) bigger using Width/Height buttons - for example set Width to 30
- draw something on the Board (LMB - draw, RMB - erase, MMB - scroll layout)
- hit save
- reload - to start with default settings
- use file chooser and select saved file
This is how it looks like after saving
And this is after loading previously saved file
When you Load the file while previewing it in debugger you can see that the "Board" Tilemap is actually loading correctly - size, placement etc etc. But after some point saved tiles are not visible, and also after this point you can't draw anything on the tilemap but you still can draw without any problems on the part where tiles are visible.