I checked United's fixtures -
A before the first group stage match, H after
A before the second group stage match, H after
A before the third group stage match, H after
A before the fourth group stage match, H after
H before the fifth group stage match, A after
H before the sixth group stage match, A after
Obviously just one team, but it seems that they are trying to give the Champions League similar home/away fixtures during the group stage.