Peak level change when grouping channel

So I have a bass sample which is peaking at 4.6 on a single channel, I then run it through a group channel, fader set to 0 dbs, no plugins on each, and this channel is reading 7.7 dbs. I have just upgraded to cubase 8 and this did not happen on cubase 6. I just don’t understand why it is changing when nothing is there to change it.

Any help would be great, thanks

experiencing this in Nuendo 11 as well, did you manage to figure out the problem?

Is your input trim on the group channel (up in the rack) set to a value greater than zero by any chance?