still happens in 5.6.3p3 - NOT fixed

This is not fixed in 5.6.0

This is not fixed in 5.6.0

Same issue. Big problem!!!

After spending hours of rebuilding my UI elements, it went crazy again. Sometimes the position values turn to NaN, sometimes overly large numbers when set to 0. It feels like the whole UI system is hanging on a thin piece of thread ready to snap at any moment.

Happening in Unity 5.6.0f3, project broken, scroll rects unusable, and I have quite many of them in my project, half the game is broken because of that.

That is not fixed in unity 5.6

Update to the previous comment I made. Resolved issue whereby inactive objects weren't fixed.
Hope this will help.

#if UNITY_EDITOR && UNITY_5_6
using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using UnityEditor;
using UnityEngine.UI;
using UnityEditor.SceneManagement;

public class ScrollRectNANEditor : EditorWindow
{
static ScrollRectNANEditor _window;

[MenuItem("ScrollRect (5.6) Bug Fixer/Open Window #F9")]
public static void Open()
{
if (_window != null)
EditorWindow.GetWindow<ScrollRectNANEditor>().Close();
//Show existing window instance. If one doesn't exist, make one.
_window = EditorWindow.GetWindow<ScrollRectNANEditor>("NAN Fixer", true, typeof(SceneView)) as ScrollRectNANEditor;
}

[MenuItem("ScrollRect (5.6) Bug Fixer/Fix Now")]
public static void FixNow()
{
Open();
_window.FixBug();
}

void OnGUI()
{
EditorGUILayout.BeginVertical();
GUILayout.FlexibleSpace();
if (GUILayout.Button ("Fix Now", EditorStyles.toolbarButton))
FixBug();
GUILayout.FlexibleSpace();
EditorGUILayout.EndVertical();
}

void FixBug()
{
if (_window == null)
{
FixNow();
return;
}

ScrollRect[] scrolls = FindObjectsOfTypeAll<ScrollRect>();
//ScrollRect[] scrolls = FindObjectsOfType(typeof(ScrollRect)) as ScrollRect[]; // Doesn't allow for inactive gameobjects.
if (scrolls == null || scrolls.Length == 0)
{
if (_window != null)
_window.ShowNotification(new GUIContent("No ScrollRects have been found."));
}
else
{
for (int i = 0; i < scrolls.Length; i++)
scrolls[i].enabled = false;

for (int i = 0; i < scrolls.Length; i++)
{
ScrollRect scroll = scrolls[i];
if (scroll.movementType == ScrollRect.MovementType.Clamped)
{
scroll.movementType = ScrollRect.MovementType.Elastic;
scroll.elasticity = 0;
}
if (scroll.content != null)
scroll.content.anchoredPosition = FixIfNaN(scroll.content.anchoredPosition);
}

for (int i = 0; i < scrolls.Length; i++)
scrolls[i].enabled = true;

if (_window != null)
_window.ShowNotification(new GUIContent(scrolls.Length + " instances have been successfully fixed ;)"));
}
}

public static T[] FindObjectsOfTypeAll<T>()
{
List<T> results = new List<T>();
for(int i = 0; i< EditorSceneManager.sceneCount; i++)
{
var s = EditorSceneManager.GetSceneAt(i);
if (s.isLoaded)
{
var allGameObjects = s.GetRootGameObjects();
for (int j = 0; j < allGameObjects.Length; j++)
{
var go = allGameObjects[j];
results.AddRange(go.GetComponentsInChildren<T>(true));
}
}
}
return results.ToArray();
}

Vector2 FixIfNaN(Vector2 v)
{
v.x = v.x.FixIfNaN();
v.y = v.y.FixIfNaN();
return v;
}

Vector3 FixIfNaN(Vector3 v)
{
v.x = v.x.FixIfNaN();
v.y = v.y.FixIfNaN();
v.z = v.z.FixIfNaN();
return v;
}
}
#endif

Still happening in 5.6.0p2

I tried the 'Clamped' option and for some odd reason was unsuccessful....so I created this script. I hope it'll help those who are also in the same position as me.

#if UNITY_EDITOR && UNITY_5_6
using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using UnityEditor;
using UnityEngine.UI;

public class ScrollRectNANEditor : EditorWindow
{
static ScrollRectNANEditor _window;

[MenuItem("ScrollRect (5.6) Bug Fixer/Open Window #F9")]
public static void Open()
{
if (_window != null)
EditorWindow.GetWindow<ScrollRectNANEditor>().Close();
//Show existing window instance. If one doesn't exist, make one.
_window = EditorWindow.GetWindow<ScrollRectNANEditor>("", true, typeof(SceneView)) as ScrollRectNANEditor;
}

[MenuItem("ScrollRect (5.6) Bug Fixer/Fix Now")]
public static void LaunchBootScreen()
{
Open();
_window.FixBug();
}

void OnGUI()
{
if (GUILayout.Button ("Fix Now", EditorStyles.toolbarButton))
FixBug();
}

void FixBug()
{
ScrollRect[] scrolls = FindObjectsOfType(typeof(ScrollRect)) as ScrollRect[];
for (int i = 0; i < scrolls.Length; i++)
{
ScrollRect scroll = scrolls[i];
scroll.enabled = false;
}

for (int i = 0; i < scrolls.Length; i++)
{
ScrollRect scroll = scrolls[i];
if (scroll.movementType == ScrollRect.MovementType.Clamped)
{
scroll.movementType = ScrollRect.MovementType.Elastic;
scroll.elasticity = 0;
}
if (scroll.content != null)
{
scroll.content.anchoredPosition = FixIfNaN(scroll.content.anchoredPosition);
}
}

for (int i = 0; i < scrolls.Length; i++)
{
ScrollRect scroll = scrolls[i];
scroll.enabled = true;
}

_window.ShowNotification(new GUIContent(scrolls.Length + " instances have been successfully fixed ;)"));
}

Vector2 FixIfNaN(Vector2 v)
{
v.x = v.x.FixIfNaN();
v.y = v.y.FixIfNaN();
return v;
}

Vector3 FixIfNaN(Vector3 v)
{
v.x = v.x.FixIfNaN();
v.y = v.y.FixIfNaN();
v.z = v.z.FixIfNaN();
return v;
}
}
#endif