Viewer not scaling for Mars Lander 2

Step to reproduce:

  1. Start Mars Lander 2
  2. Launch the first test (and fail it?)
  3. Drag the column between the IDE and the player to modify their sizes
  4. Drop the column somewhere

What happens:
The rendering of the viewer is updated as if the viewer has its initial size. So when reducing it’s size, there is much like nothing to see:

What should happens:
The rendering shouldn’t be updated like that after dropping. It is fine when dragging the column.

Windows 10 N Pro
Google Chrome v47