Small bug on FindAndDefeatZerglings

Hi,
I just noticed that at step 0 of FindAndDefeatZerglings the marines appear as selected only on the minimap_features layers 'selected', but not in the one of screen_features. At step 1 selects them in both and that solves the problem.

It's nothing too important, but I noticed it's affecting the action space and consequently the behaviour of my agent.
Example:

Available actions after calling env.reset()
0/no_op ()
1/move_camera (1/minimap [0, 0])
2/select_point (6/select_point_act [4]; 0/screen [0, 0])
3/select_rect (7/select_add [2]; 0/screen [0, 0]; 2/screen2 [0, 0])
4/select_control_group (4/control_group_act [5]; 5/control_group_id [10])
7/select_army (7/select_add [2])

After playing no_op()
0/no_op ()
1/move_camera (1/minimap [0, 0])
2/select_point (6/select_point_act [4]; 0/screen [0, 0])
3/select_rect (7/select_add [2]; 0/screen [0, 0]; 2/screen2 [0, 0])
4/select_control_group (4/control_group_act [5]; 5/control_group_id [10])
5/select_unit (8/select_unit_act [4]; 9/select_unit_id [500])
453/Stop_quick (3/queued [2])
7/select_army (7/select_add [2])
451/Smart_screen (3/queued [2]; 0/screen [0, 0])
452/Smart_minimap (3/queued [2]; 1/minimap [0, 0])
331/Move_screen (3/queued [2]; 0/screen [0, 0])
332/Move_minimap (3/queued [2]; 1/minimap [0, 0])
333/Patrol_screen (3/queued [2]; 0/screen [0, 0])
334/Patrol_minimap (3/queued [2]; 1/minimap [0, 0])
12/Attack_screen (3/queued [2]; 0/screen [0, 0])
13/Attack_minimap (3/queued [2]; 1/minimap [0, 0])
274/HoldPosition_quick (3/queued [2])