Hi @koeny, sorry to hear that.. very strange indeed. The only thing I can currently think is that perhaps the settings are not being honored. You could try using RevoUninstaller to remove the Tobii Software and reinstall. Certainly, the Tobii Device should not interfere on any wireless band that your mouse may use.
If the issue *still* persists, then please raise a ticket with the support team @ https://help.tobii.com/hc/en-us/requests/new and they can possibly initiate a remote session of your system.