Bug LocalizedString PropertyDrawer foldout-knob disrespects rect-position / bleeds in other area

The LocalizedString drawer renders in front of the given position, this is quite annoying, since it breaks with other EditorGUI-Elements. See the Color-Field above correctly starting after the toggle-button + 2 pixel offset, while the foldout-knob being rendered inside of the button:
"Fixing" it by adding additional offset, results in the other drawers not being placed neatly after the button:

Code is really simple the horizontal position is the default position + width and small offset of the toggle-button
which is a rect of the size of EditorGUIUtility.singleLineHeight and the height being the height of rendered property provided via the overriden GetPropertyHeight function.
Can I somehow determine whether or not the property to be rendered respects the given horizontal start-position and if not by how much it bleeds in front of it (best case without having to know the Type of the property-field being rendered)

Code (CSharp):

1. EditorGUI.PropertyField(pos, property.FindPropertyRelative("NonReferenceValue""), new GUIContent(""), true);

Also can we do something about the wasted empty space between label and controls?

 

Theres another problem with the width of the drawn property, if it's not the last element placed horizontally, the dropdowns/buttons seem to a) ignore the provided rect for the property-drawer and b) totally get messed up by that:

Code (CSharp):

1. // render with preview
2. var targetSerializedObject = new SerializedObject(referenceProperty.objectReferenceValue);
3. var previewValueProperty = targetSerializedObject.FindProperty("_propertyValue");
4. if (previewValueProperty != null)
5. {
6.     // full TargetFieldRect is provided and defines the red marked area plus the area on its right
7.     var previewRectSplit = fullTargetFieldRect;
8.     // reduce the rects xMax to aquire half the width of the fill width and be placed on the left side:
9.     previewRectSplit.xMax = fullTargetFieldRect.xMax - (fullTargetFieldRect.width / 2f);
10.     // use the same rect for the reference-field (SO) but displace by its own width which equals half width of the total width.
11.     var referenceRectSplit = previewRectSplit;
12.     referenceRectSplit.position += new Vector2(previewRectSplit.width, 0f);
13.            
14.     // this one does weird stuff if the previewValueProperty is a LocalizedString
15.     EditorGUI.PropertyField(previewRectSplit, previewValueProperty, new GUIContent(""), true);
16.                
17.     EditorGUI.PropertyField(referenceRectSplit, referenceProperty, new GUIContent(""), true);
18.     targetSerializedObject.ApplyModifiedProperties();
19.     return;
20. }
21. // ... render reference field for full width....
22.  

Edit: If I swap rects of preview / reference property they still are placed totally off (outside of the shown area: