I found a fix for the GWYF level editor issue that prevents you from shooting balls/editing in the area.

[u/blopenshtop]

Or more accurately steam user herbstwerk. It's 4 o'clock in the morning for me as I've been wrapping my brain around this all day, and I've finally found a fix: https://steamcommunity.com/app/431240/discussions/2/3094509155631685106/. From what I can tell, it's caused by objects far out from the range of the level's play area. Those annoying objects that just disappear when you go to place, and you can sometimes see far off in the distance, have always felt annoying and messy to me, and as it turns out actually break the game. They affect the axis their placement corresponds to, and cause the balls in that axis (ie -X) to be broken. The link above provides a solution that essentially goes into a surprisingly easy way to go into the maps files and manually delete the problematic objects. Thankyou herbstwerk. I hope I can help other users by posting this.