Backward Position Tracking Reversed

Hello everybody,

I am a little bit in hurry. The Deadline is ahead and I have huge issues with my Rift.
I am creating an Application with Unreal Engine and suddenly have the following problem:

When I am standing backwards to the sensor, my position tracking is sometimes not working at all or even worse: it is often reversed. Means when I lean/move left, the player leans/move right and vice versa. It seems as if the sensor does not recognize that I am standing backwards when interpreting my position. The rotation of the device is just right but not the position.
I have an old version of this application that worked fine at around September/October but right now it has the same issues - so I guess this has nothing to do with Unreal Engine but with the Oculus.
I am in urgent need of help and hope that you have a solution for this.

My Oculus App is in version 1.10.2.322199 (1.10.2.321138)

Thank you all in advance.