Update gameObject's children properties from CustomEditor class

I have a custom button HUD_Button that is the parent of Icon(game object with image component) and Text(game object with text component) and I want to set the Icon's image and Text's string from HUD_Button's inspector. I wrote a custom Editor class for HUD_Button and I try to set them in OnInspectorGUI() like this:

 public override void OnInspectorGUI()
 {
     HUD_Button Ref = target as HUD_Button;
     
     [...] // add custom fields
     
     Image iconComp = Ref.gameObject.GetComponentInChildren<Image>();
     if (iconComp != null)
         iconComp.sprite = Ref.m_IconSprite;
         
     Text textComp = Ref.gameObject.GetComponentInChildren<Text>();
     if (textComp != null)
         textComp.text = Ref.m_Description;
 }

The problem is that iconComp's material is not being updated in editor, and neither is the textComp's rendered text. However, they get updated if I save the scene. Is there a way to update them without saving the scene? Something like textCom.UpdateRenderedText() and imgCom.UpdateMaterial()