How do I fix the terrain tool?

My terrain tool cursor is stuck on an axis and will not move above terrain that is higher. It looks as if it was stuck to an axis but I have no settings on to do so (Plane Lock and Snap to Grid). Is there a way to reset the terrain tool (I’ve reset studio settings) or fix it?

This started to happen two days ago…

Thanks for helping if you can!

This is sorta a bug report.
Follow these guidelines: Bug Report Guidelines, and send it over to the Bug Support Team by DMing them @Bug-Support