AX53 sound when downloading

[bigeel]

have an AX53. when I've done a recording with my Saramonic Uwmic9 Wireless mic, I can play back recording on camera and sound volume is fine. if I download the recording then no sound is present unless i turn all volume controls to max and then it can just be heard. this does not happen with my rode mic or the built in mic? any help would be gratefully appreciated