dot creates ugly edge instead of simple curve

Steps to reproduce

dot -Tpng myfile.gv >myfile.png

myfile.gv:

digraph G {
    rankdir = LR;
    node [ shape = circle ];
    node [ label = "", width = 0.3 ];                 
    S10 -> S5  [ label = <i> ];  
    S7  [ shape = doublecircle ];
    S2  -> S11  [ label = <a> ];
    S8  -> S10 [ label = <t> ];
    S5  -> S4  [ label = <o> ];  
    S5  -> S2  [ label = <c> ];
    S4  -> S2  [ label = <n> ];
    S0  -> S7  [ label = <n> ];
    S8  -> S0  [ label = <e> ];
}

Instead of simple curve connecting S5 -> S2, "c" edge contains a "hiccup"

Expected Behaviour

"Nice" symmetric edge is desired

Actual Behaviour

OS Version

Linux: lsb_release -a

No LSB modules are available.
Distributor ID: Linuxmint
Description:    Linux Mint 20.3
Release:        20.3
Codename:       una

Graphviz Version

dot - graphviz version 4.0.1~dev.20220529.1049 (20220529.1049)