Navmesh won't generate in studio testing enviroment properly

Navmesh generation doesn’t work properly.
The navmesh only generates in a small square randomly on the map, this only occurs when I’m running the game in roblox studio (not when I launch it via the app)
I’m pretty sure this is a roblox bug because it broke after an update, and a previous version that was working no longer works.
Navmesh generation before running in roblox studio:

Navmesh generation after running in roblox studio:

Tested it on a flat baseplate and the navmesh refuses to show up at all.

Probably a silly setting in studio that I overlook so please let me know if you know the issue!