Anthony
dtappe

Hi, I have a similar issue, where I add and remove ResponsiveContainer child components.
Don't know if this helps but I made these changes that currently solves my issue.
and also prevents continuous Resize() update calls.

Update to ResponsiveItem.cs

    [ExecuteAlways]
    public class ResponsiveItem : MonoBehaviour
    {
        public ResponsiveContainer.ResponsiveItemData settings;

        private void OnEnable()
        {
            InvokeParentsOnTransformChildrenChanged();
        }

        private void OnDisable()
        {
            InvokeParentsOnTransformChildrenChanged();
        }
        
        private void OnRectTransformDimensionsChange()
        {
            InvokeParentsOnTransformChildrenChanged();
        }

        private void InvokeParentsOnTransformChildrenChanged()
        {
            var containers = GetComponentsInParent<ResponsiveContainer>();
            foreach (var container in containers)
            {
                container.OnTransformChildrenChanged();
            }
        }
    }

Update to ResponsiveContainer.cs (line 52 to 71) in v1.0.2

        void Start()
        {
            Init();
            Resize(!Application.isPlaying);
        }

        private bool transformChildrenChanged;
        public void OnTransformChildrenChanged()
        {
            if (container != null)
            {
                activeChildren = GetChildrenFirstDepth(container);
                activeChildCount = activeChildren.Count;
            }

            transformChildrenChanged = true;
        }

        /// <summary>
        /// Initialize the component
        /// </summary>
        private void Init()
        {
            container = GetComponent<RectTransform>();
            activeChildren = GetChildrenFirstDepth(container);
            activeChildCount = activeChildren.Count;
        }

        void Update()
        {
            if (!transformChildrenChanged)
                return;
            transformChildrenChanged = false;
            
            // Force resize only when not playing
            Resize(!Application.isPlaying);
        }

Oh. PS.
I added a "Assembly Definition" - Exoa.Responsive.asmdef to the Exoa -> ResponsiveUI root folder.
this was required to add it as a Assembly Definition Reference in one of my project files that also has it's own Assembly Definition.