Nested calls to `element.query_selector(selector)` fail

[julesmcrt]

I can't figure out why, but element.query_selector(selector) seems to only work the first time I call it.
Here is an example on https://www.dezlearn.com/nested-iframes-example/

from seleniumbase import Driver

driver = Driver(uc=True)
driver.uc_activate_cdp_mode("https://www.dezlearn.com/nested-iframes-example/")
driver.sleep(5)

iframe1 = driver.cdp.find_element("iframe#parent_iframe") # this works
print(type(iframe1))
# type(iframe1) is <class 'seleniumbase.undetected.cdp_driver.element.Element'>

iframe2 = iframe1.query_selector("iframe#iframe1") # this works
print(type(iframe2))
# type(iframe2) is <class 'seleniumbase.undetected.cdp_driver.element.Element'>

button = iframe2.query_selector("button#u_5_6") # this doesn't work, but doesn't output any error message either
print(type(button))
# type(button) is <class 'NoneType'>

Can you replicate this? I'm on SeleniumBase version 4.34.15

[mdmintz]

The second iframe is cross-origin, so you can't reach it direct like that via CDP.
However, you can reach it via the SB CDP PyAutoGUI methods. Eg:

from seleniumbase import SB

with SB(uc=True) as sb:
    url = "https://www.dezlearn.com/nested-iframes-example/"
    sb.activate_cdp_mode(url)
    sb.cdp.gui_click_element("h2")
    sb.uc_gui_press_keys("\t\t\n")
    sb.sleep(3)