Ran into a really strange situation while having an Xbox controller connected before launching Unreal Editor. This can cause a lock to 170 degrees for the FOV and all attempts to change it in editor revert back to 170. I don’t think this happens fore everyone but it did for me as well as several other people. The solution is to remove the Xbox controller before the editor starts. Plugging the controller in after the editor launches seems to be ok. Found the solution here…

How do I fix this issue with camera FOV?

Seems that unplugging the controller doesn’t fix the problem for everyone. I’m not certain of the root cause of this issue.