Davinci Resolve changes the volume of my audio track

Hi, I'm post producing a music video in Resolve and the program changes the volume from the initial master wav. It reduce around 4db but it is a lot!!! The producers send the final master of the song and It must not be touched.

In the track channel the audio is okey, but when it goes to the final bus it is low

Any suggestion?

The summation of two identical signals of equal amplitude and phase increases the level of the resulting signal, hence the attenuation on the stereo Bus 1 to produce equal power output and equal perceived loudness. This is the result of Pan Law, in this case “-3dB compensation” being applied.

Configure Bus 1 as Mono, and its metering will match the A2 Mono Audio Channel.

Alternatively, Pan the A2 Mono Audio Track hard left, and the metering on the Left Channel of the Stereo Bus 1 will match the A2 Mono Audio Track, and the metering on the Right Channel of the Stereo Bus 1 will register as negative infinity.

Is the source audio Mono or Stereo? Change the Track Format of the A2 Track from Mono to Stereo if the source is Stereo.