maplibre-gl-js version: 5.7.1

browser: //

Steps to Trigger Behavior

1. initialize Map with globe projection
2. check map.transform.getCameraAltitude()
3. returns NaN

Link to Demonstration

https://jsbin.com/jelitabegi/edit?html,output

Expected Behavior

I expect it to return the camera altitude

Actual Behavior

it returns NaN