Note that this issue does not affect macOS 12 Monterey.
There is a known issue that can occur that will cause erratic placement when moving certain elements in a document with a mouse or trackpad.
This can affect expressions, chord symbols and lyric syllables. The issue is seen when opening a document while a handle-based tool (like the Expression tool) is active.
There are two ways to work around the issue.
- Select the Simple Entry tool (or any other tool that does not use handles), then close and reopen the document.
- Use the arrow keys to reposition the element.
We do understand the difficulty that issue can present and are working with Apple and in-house to resolve this quickly.