Assist Me only partially working

[Puntr]

5 Man Team with toons A, B, C, D and E. Hitting Alt+A (default Assist Me keybind) I get the following results

Bind Used	A	B	C	D	E
A	U
B	X	U
C	X	X	U	X	X
D	X	X	X	U	X
E	X				U

As you can see only C and D will cause the other chars to assist, B and E will only have A assist and A won't get any assists.
They all have ISBoxer add-on turned on and i've remade the team.

Config Link
https://gist.github.com/strattonw/edbc77181b8e9923a9da

For reference
A -> Puntrchi
B -> Myriadone
C -> Endlessone
D -> Multipleone
E -> Variableone