Freeze on opening score saved in Musescore 4.2

[mercuree]

Issue type

Crash or freeze

Description with steps to reproduce

1. Open attached score InfernoPortrait.mscz.zip (remove .zip before open)
2. Musescore freezes

In which versions of MuseScore Studio is this issue present?

Musescore 4.4.0 - 4.7.0 master

Regression

Yes, this used to work in a previous version of MuseScore 4.x

Operating system

windows 10

Additional context

This issue is based on a report from https://musescore.org/en/node/387724

Checklist

• [x] This report follows the guidelines for reporting bugs and issues
• [x] I have verified that this issue has not been logged before, by searching the issue tracker for similar issues
• [x] I have attached all requested files and information to this report
• [x] I have attempted to identify the root problem as concisely as possible, and have used minimal reproducible examples where possible

[krasko78]

The first while loop in AlignmentLayout::scanConnectedItems is endless: snappedBefore alternates between 3 values.