I had the same problem with my 1.2x. Its a simple fix:
Ensure that Audacity is set to export in stereo. Click ‘Edit’, ‘Preferences’, and then ‘Audio I/O’. In ‘Exporting Channels’, make sure the setting is at ‘2 (stereo)’.
See to it that any balance controls (for example, on your mixer or amplifier) are centrally-placed, not biased towards either channel.
In the system mixer, ensure that the right and left channels are balanced. In Windows, click the ‘Volume’ icon in the taskbar at the bottom-right of your screen. Check the horizontal ‘Balance’ bars and set the arrow at the center of the line between the two speaker icons.