Regression in 3.0.4: convertPathData breaks paths

[cyberalien]

Describe the bug

Source icon:

<svg xmlns="http://www.w3.org/2000/svg" width="24" height="24" viewBox="0 0 24 24"><path fill="currentColor" d="M8.5 12q1.05 0 1.75-.763t.975-1.812l-1.45-.35q-.125.55-.438.988T8.5 10.5q-.525 0-.838-.438t-.437-.987l-1.45.35q.275 1.05.975 1.813T8.5 12Zm3.5 5.5q.975 0 1.875-.438t1.675-1.312l-1.1-1q-.55.6-1.175.913T12 15.974q-.65 0-1.275-.312T9.55 14.75l-1.1 1q.8.875 1.688 1.313T12 17.5Zm3.5-5.5q1.05 0 1.75-.763t.975-1.812l-1.45-.35q-.125.55-.437.988t-.838.437q-.525 0-.838-.438t-.437-.987l-1.45.35q.275 1.05.975 1.813T15.5 12ZM12 22q-2.075 0-3.9-.788t-3.175-2.137q-1.35-1.35-2.137-3.175T2 12q0-2.075.788-3.9t2.137-3.175q1.35-1.35 3.175-2.137T12 2q2.075 0 3.9.788t3.175 2.137q1.35 1.35 2.138 3.175T22 12q0 2.075-.788 3.9t-2.137 3.175q-1.35 1.35-3.175 2.138T12 22Zm0-10Zm0 8q3.35 0 5.675-2.325T20 12q0-3.35-2.325-5.675T12 4Q8.65 4 6.325 6.325T4 12q0 3.35 2.325 5.675T12 20Z"/></svg>

Icon optimised in 3.0.4 using only convertPathData plugin:

<svg xmlns="http://www.w3.org/2000/svg" width="24" height="24" viewBox="0 0 24 24"><path fill="currentColor" d="M8.5 12q1.05 0 1.75-.763t.975-1.812l-1.45-.35q-.125.55-.438.988T8.5 10.5q-.525 0-.838-.438t-.437-.987l-1.45.35q.275 1.05.975 1.813T8.5 12m3.5 5.5q.975 0 1.875-.438t1.675-1.312l-1.1-1q-.55.6-1.175.913T12 15.974q-.65 0-1.275-.312T9.55 14.75l-1.1 1q.8.875 1.688 1.313T12 17.5m3.5-5.5q1.05 0 1.75-.763t.975-1.812l-1.45-.35q-.125.55-.437.988t-.838.437q-.525 0-.838-.438t-.437-.987l-1.45.35q.275 1.05.975 1.813T15.5 12M12 22q-2.075 0-3.9-.788t-3.175-2.137q-1.35-1.35-2.137-3.175T2 12q0-2.075.788-3.9t2.137-3.175q1.35-1.35 3.175-2.137T12 2q2.075 0 3.9.788t3.175 2.137q1.35 1.35 2.138 3.175T22 12q0 2.075-.788 3.9t-2.137 3.175q-1.35 1.35-3.175 2.138T12 22m0 8q3.35 0 5.675-2.325T20 12q0-3.35-2.325-5.675T12 4Q8.65 4 6.325 6.325T4 12q0 3.35 2.325 5.675T12 20"/></svg>

The only optimisation here that I can see is removal of z, so most likely issue is caused by this: #1822 (edit: fixed link to correct pull request)

To Reproduce
Steps to reproduce the behavior:
optimize(src, {plugins: ['convertPathData']})

Desktop (please complete the following information):

• SVGO Version: 3.0.4
• NodeJs Version 20.5.0
• OS: macOS 14.1.1

Additional context
Works correctly in 3.0.3

[KTibow]

The issue seems to be caused by the meaningless instruction in the middle of the face getting removed

[cyberalien]

It seems meaningless, but it does affect icon rendering, so it has some purpose.

I have no idea why it does that. Doesn't make any sense, but it does work.

[SethFalco]

Thanks for reporting the issue! And thanks KTibow for solving it.
The fix will be released in SVGO v3.0.5. (ETA, 1 December 2023)