Thanks for the advice, BurrMan. Appreciate it.

It happens in an empty file, and whenever I load a file up as well.

I'm not sure I'd want to change the perspective, it would just negatively impact my design work in all honesty. Though it's worth a test to see if it makes any difference in the viewport problem.

Appreciate the compliments about the rig as well. Good luck with your son's! hopefully it all turns out well!