Elements within iframe area on the page cannot be selected

[zhangkaien]

During use, I found that if a page contains an iframe, the elements within that iframe area cannot be selected. This prevents normal interaction or inspection of those elements.

Steps to Reproduce:

1. Navigate to a page that includes an iframe.
2. Attempt to click on or select any element inside the iframe.

Expected Result:
Elements inside the iframe should be selectable, just like elements in the main page.

Actual Result:
The elements within the iframe cannot be selected.