Sand Castle Example
The first time you load that example, everything will seem to behave normally. Any subsequent time you press Run (F8) or reload it, the viewer will zoom all the way in as far as it possibly can.
I don’t know if I’m doing something wrong with the CZML or the way I’m loading it, or if I’ve stumbled upon a bug. The issue is present in both 1.75 and 1.76 Perhaps I just need a second set of eyes to catch what I’m doing wrong.
Edit: I should probably mention that any Cesium.HeadingPitchRange setting gets ignored.