Flowchart decision box is not starting the edges to outer box

[Tri16]

Hi @tobie I am trying out this flowchart and the edges starting from Is it decision box are staring after space they are not touching the decision box

%%{ init: { 'flowchart': { 'curve': 'stepBefore' } } }%%
flowchart LR
subgraph B1
direction RL
i1 -->f1
end
subgraph B2
direction RL
i2 -->f2
end
subgraph B3
direction RL
i5 -->f5
end
subgraph B4
direction RL
i3 -->f4
end

A -->C{Is it?}
C --Yes --> B1
C --No --> B3
B1 --> B2
B3 --> B4 ---> B
B2 ---> B

the lines starting from rhombus box of Is it are not touching the decision box