Some films on Sky Q very quiet

We have Sky Q and for sound use a Sonos Beam and 2 x Play 1’s.

Generally for most things I will have the volume 20. I watched Gran Turismo this weekend which was downloaded from Sky cinema and it was so quiet. I tried the Flash last night and same dead quiet, I had to turn the volume up to 40 ish. Barbie is absolutely loud at volume 20.

Is this a Sky Q issue?