Audio issue

Hi. I'm a french girl so i'm sorry for my english.
I have a BM6K and a lapel microphone Rode (https://fr.rode.com/wireless/filmmaker).
Last week I recorded with the BM6K and the microphone and everything was alright.
But today, i have an echo in the return camera. If I record and have a look on my computer : nothing, the sound is great... It's problematic, I can't know if have an audio issue during the recording.
I tried the mic on my canon 5d, on my zoom record, everything was good.
It doesn't seem to be my headsets or the wires.
Do u have an idea about that issue ?
Thanks.

Chloe, can you be more specific about your mic and camera setup when you have the echo? Do you think there may be an audio latency issue going to the headphones? I’m just not sure of the audio path you are using.

Sounds like you have set your Rode lapel to one channel and the camera mic to the other. You have to lower the volume of the camera mic channel to zero, otherwise you can hear it in your headphone.