Master volume issue using iPhone + Reloop MIXTOUR

Hi,

I just purchased the RELOOP MIXTOUR in order to use it mostly with my iPhone (iOS 14.1) thanks to the size of it so I can take it anywhere.

Well I just found out the master volume goes down when either previewing a song or listening the song playing on either deck through the headphones.
Please be aware I’ve tried connecting my iPhone to the controller through both the special cable and dedicated port it has for iOS and through the regular usb cable via an external adapter.

I´ve contacted both Algoriddim and Reloop to check with them too.
Many thanks.