Script helps to find if Unity leaves any assets in memory, what causes overflow. Usually it happens after creating assets in runtime.

DetectLeaks.cs

// Script helps to find if Unity leaves any assets in memory, what causes overflow. 
// Usually it happens after creating assets in runtime.

using UnityEngine;

public class DetectLeaks : MonoBehaviour
{
    void OnGUI()
    {
        if (GUILayout.Button("Unload Unused Assets"))
        {
            Resources.UnloadUnusedAssets();
        }

        if (GUILayout.Button("Mono Garbage Collect"))
        {
            System.GC.Collect();
        }

        if (GUILayout.Button("List Loaded Textures"))
        {
            ListLoadedTextures();
        }

        //if (GUILayout.Button("List Loaded Skins"))
        //{
        //    ListLoadedSkins();
        //}

        //if (GUILayout.Button("List Loaded Styles"))
        //{
        //    ListLoadedStyles();
        //}

        if (GUILayout.Button("List Loaded Sounds"))
        {
            ListLoadedAudio();
        }

        if (GUILayout.Button("List Loaded GameObjects"))
        {
            ListLoadedGameObjects();
        }


        GUILayout.Label("All " + Resources.FindObjectsOfTypeAll(typeof(UnityEngine.Object)).Length);
        GUILayout.Label("Textures " + Resources.FindObjectsOfTypeAll(typeof(Texture)).Length);
        GUILayout.Label("AudioClips " + Resources.FindObjectsOfTypeAll(typeof(AudioClip)).Length);
        GUILayout.Label("Meshes " + Resources.FindObjectsOfTypeAll(typeof(Mesh)).Length);
        GUILayout.Label("Materials " + Resources.FindObjectsOfTypeAll(typeof(Material)).Length);
        GUILayout.Label("GameObjects " + Resources.FindObjectsOfTypeAll(typeof(GameObject)).Length);
        GUILayout.Label("Components " + Resources.FindObjectsOfTypeAll(typeof(Component)).Length);
    }

    public void Init()
    {

    }

    void Start()
    {
        DontDestroyOnLoad(gameObject);
    }

    private void ListLoadedTextures()
    {
        Object[] textures = Resources.FindObjectsOfTypeAll(typeof(Texture));

        string list = string.Empty;

        for (int i = 0; i < textures.Length; i++)
        {
            if (textures[i].name == string.Empty)
            {
                continue;
            }

            list += (i.ToString() + ". " + textures[i].name + "\n");

            if (i == 500)
            {
                Debug.Log(list);
                list = string.Empty;
            }
        }

        Debug.Log(list);
    }

    private void ListLoadedSkins()
    {
        Object[] skins = Resources.FindObjectsOfTypeAll(typeof(GUISkin));

        string list = string.Empty;

        for (int i = 0; i < skins.Length; i++)
        {
            if (skins[i].name == string.Empty)
            {
                continue;
            }

            list += (i.ToString() + ". " + skins[i].name + "\n");

            if (i == 500)
            {
                Debug.Log(list);
                list = string.Empty;
            }
        }

        Debug.Log(list);
    }

    private void ListLoadedStyles()
    {
        Object[] styles = Resources.FindObjectsOfTypeAll(typeof(GUIStyle));

        string list = string.Empty;

        for (int i = 0; i < styles.Length; i++)
        {
            if (styles[i].name == string.Empty)
            {
                continue;
            }

            list += (i.ToString() + ". " + styles[i].name + "\n");

            if (i == 500)
            {
                Debug.Log(list);
                list = string.Empty;
            }
        }

        Debug.Log(list);
    }

    private void ListLoadedAudio()
    {
        Object[] sounds = Resources.FindObjectsOfTypeAll(typeof(AudioClip));

        string list = string.Empty;

        for (int i = 0; i < sounds.Length; i++)
        {
            if (sounds[i].name == string.Empty)
            {
                continue;
            }
            list += (i.ToString() + ". " + sounds[i].name + "\n");
        }

        Debug.Log(list);
    }

    private void ListLoadedGameObjects()
    {
        Object[] gos = Resources.FindObjectsOfTypeAll(typeof(GameObject));

        string list = string.Empty;

        for (int i = 0; i < gos.Length; i++)
        {
            if (gos[i].name == string.Empty)
            {
                continue;
            }
            list += (i.ToString() + ". " + gos[i].name + "\n");
        }

        Debug.Log(list);
    }
}