Descriptive Problem Summary:
Attempting to add a screen object outside of the map (by setting it's screen y-coordinate to 0) cuts off the top row of the view and adds tiles where the screen object is located.

Numbered Steps to Reproduce Problem:
Add a screen object with screen_loc of x,0 to the client's screen

Code Snippet (if applicable) to Reproduce Problem:
Sample Project in the discord

Expected Results:
Screen object rendered below the client's view, without really affecting it.

Actual Results:
Screen object is rendered on the client's view, while also cutting off the top row of tiles.

Did the problem NOT occur in any earlier versions? If so, what was the last version that worked? (Visit http://www.byond.com/download/build to download old versions for testing.)
The latest stable version works as intended.