Blue message
Blue message
+
Green message
=
Blue message
Blue message
Green message
Red message
+
Yellow message
=
Red message
Yellow message
+
White message
=
Red message
Yellow message
White message
Practical example:
TeaM_JayL says: lol
TeaM_JayL says: forsrs
+
TeaM_JayL shouts: lol!
=
TeaM_JayL says: lol
TeaM_JayL says: forsrs
TeaM_JayL shouts: lol!
So yeah, it's the reason it is not possible to do such thing. When that bug is fixed this can be sorted out.