gitGraph BT: wrong curve when commit line goes left then up

[thefasquelle]

Description

in a gitGraph going from bottom to top, lines that go from bottom right to top left have wrong curvature.

This can happen when reordering branches or cherry picking.

gitGraph BT:
    commit
    branch develop order: 3
    checkout develop
    commit
    
    branch release/1.0.0 order: 2
    checkout release/1.0.0
    commit
    commit
    checkout main
    merge release/1.0.0 tag: "v1.0.0"
    checkout develop

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gitGraph BT:
    checkout main
    commit
    commit
    commit tag:'1.0.0'
    branch dev.1.0.1
    checkout main
    commit
    checkout dev.1.0.1
    commit id:"hotfix" tag:'1.0.1' type:HIGHLIGHT
    checkout main
    cherry-pick id:'hotfix'

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Both of these examples are fine with TB and LR orientations.

Steps to reproduce

1. start a gitGraph with BT orientation
2. Make a commit that must create a line that goes left then up
3. The curve goes right then up instead of left then up

Screenshots

Code Sample

gitGraph BT:
    commit
    branch develop order: 3
    checkout develop
    commit
    
    branch release/1.0.0 order: 2
    checkout release/1.0.0
    commit
    commit
    checkout main
    merge release/1.0.0 tag: "v1.0.0"
    checkout develop

gitGraph BT:
    checkout main
    commit
    commit
    commit tag:'1.0.0'
    branch dev.1.0.1
    checkout main
    commit
    checkout dev.1.0.1
    commit id:"hotfix" tag:'1.0.1' type:HIGHLIGHT
    checkout main
    cherry-pick id:'hotfix'

Setup

• Mermaid version: live editor v11.6.0
• Browser and Version: Chrome 136.0.7103.93

Suggested Solutions

No response

Additional Context

No response