layout_builder_iframe_modal_link_alter no longer works when contextual is enabled.

Hi @leo liao,

I had this problem too and it was related to some client side caching for contextual links.
I solved it by clearing browser cache. I was in Chrome, so I followed the usual steps to clear the cache:

1. Open Developer tools.
2. Go to Application tab.
3. Open the Session Storage by click the arrow icon.
4. Select the website url.
5. On right panel click on "Clear All" icon.

May be this solutions helps you too.
Regards

Could it be related to 🐛 iframe z-index of 101 is lower than contextual link z-index at 500 RTBC