Hello,

The behavior you're experiencing is intentional. When the label of a PropertyField is changed, a Rebind is necessary to ensure everything is up-to-date. This is because labels are communicated to custom property drawers through the propertyDrawer.preferredLabel property, which won't update automatically in such situations. Additionally, users might have an IPrefixLabel control preceding the actual field, or they might display the same field multiple times. To address these scenarios, we force an update by rebinding the entire element whenever the label changes. A Rebind operation first performs a full Unbind, which means it removes all existing bindings, including TrackPropertyValue.

Unfortunately, maintaining your binding in this context isn't feasible. However, there is a workaround: you can attach your binding to a different element. Here is an example that demonstrates this approach:

```
public override VisualElement CreatePropertyGUI(SerializedProperty property)
{
var parent = new VisualElement();

PropertyField field = new PropertyField(property, label: GetModifiedLabel(property));
field.name = "My Custom Field";

parent.TrackPropertyValue(property, (updatedProperty) =>
{
Debug.Log("Property has been modified");

string oldLabel = field.label;
string newLabel = GetModifiedLabel(updatedProperty);

if (oldLabel != newLabel)
{
Debug.Log("Updating label");
field.label = newLabel;
}
});

parent.Add(field);

return parent;
}
```

By attaching the binding to the parent VisualElement, you can monitor changes without interfering with the rebind process. This approach ensures that the updated label is set correctly without disrupting other functionalities.