Any Sony camera user out there NOT have the timecode signal bleeding issue?

I have this cable and plugged it into my Sony A74 camera, then attached the Tentacle Sync E Mk2 unit that I used earlier as a slave to accept the master audio timecode signal from my Sound Devices Mix Pre 3 II external audio recorder. So now the Tentacle Sync E Mk2 unit is sending timecode to the camera's left channel. Also I attached a Deity V-Mic D3 Pro to send audio to the camera's right channel and then I recorded a video clip. When I play back the clip on my headphones, I hear audio from both channels, so I'm hearing the loud whir from the timecode signal on the left channel at the same time as the person's voice on the right channel. I would like to find a solution that will allow me to monitor the video/audio take, hearing audio that is synced with the video clip, when I review by playing back the clip in camera. With the Sound Devices Mix Pre 3 II recorder, that high quality .WAV file will be synced later in post. I'm thinking that I would need a pair of headphones with a disabled left channel, so only the right channel is allowed to playback while I review the camera take on set. Can anyone recommend headphones that one can switch off the left channel, or have another solution that will allow a review of the synced audio/video clip on set? Thank you.