Descriptive Problem Summary:
When you create a Secondary Map at runtime using winset, on top of the main map, create objs with their screen_loc on the secondary map, add them to screen, and then remove the Secondary Map using winset without first removing the objs from screen, the game starts having lags/glitches every few seconds.

Numbered Steps to Reproduce Problem:
1 - Add a new window with winset that has a secondary map on top of the main map
2 - Create an obj that has the screen_loc in this secondary map
3 - Add the created obj to the screen
4 - Remove the new window with winset

Code Snippet (if applicable) to Reproduce Problem:
Demo sent in byond dm's.

Expected Results:
No glitch

Actual Results:
Glitches/Lag

Does the problem occur:
Every time? Or how often? Every time
In other games? Yes
In other user accounts? Yes
On other computers? Yes

When does the problem NOT occur? Never

Workarounds: Clearing out the objs before removing the window.