Solve System of differential equations

[PepePepe]

But it seems that HP Prime it's doing something wrong if I do that. For example:

desolve(y'=[[1,0],[0,2]]*y,t,y)

gives the same solution as

desolve(y'=[[1,0],[0,2]]*y + [[3],[4]] ,t,y)

I think it is because the calculator is interpreting [[1,0],[0,2]]*y as [[y,0],[0,2y]] (it doesn't take into account that y is a vector)

How could I solve this? Am I doing something wrong?

Thanks!