Thank you for this bug report! We will create an internal ticket to get this looked at.
In the meantime, here is the workaround:
On the default preset for Xbox Controller and Mouse, the inputs for external camera and cockpit camera are not set as an Axis.The drone camera is set up as Axis, so the up and down movement, and left and right movement, can be inverted easily using that invert input setting.
Cockpit (same for external):
Drone/Showcase:
Therefore, if you want to invert the controls on the external camera and cockpit camera, you need to create a new control preset and set the controls in the opposite configuration.
To do this, instead of using the ‘Scanning’ feature, use the list of controller actions on the left hand side and click on the action you’d like to use.