How to pass value to Instagram search string using Selenium (Python)?

Question

Python

Good day everyone!
I'm new to Selenium and I'm trying to pass a specific nickname to the Instagram search field.
There is a code:

username="USERNAME"
password="PASSWORD"
driver=webdriver.Chrome("C:\\Users\\ME\\Downloads\\chromedriver_win32\\chromedriver.exe")
driver.get("https://www.instagram.com/accounts/login/")
driver.find_element_by_xpath("//div/input[@name='username']").send_keys(username)
driver.find_element_by_xpath("//div/input[@name='password']").send_keys(password)
driver.find_element_by_xpath("//span/button").click()
driver.find_element_by_xpath("//input[@placeholder='Поиск']").send_keys('NICKNAME')

I successfully log in, go to my account, but the "Search" field does not think to be filled
in. This is how the code of the search string looks like.

Please tell me what I'm doing wrong?
If I just change the last line to the address of the page I'm interested in,
https://www.instagram.com/NICKNAME/
then the browser successfully redirects me to the address of this page, but only now, it again offers me to enter the site again

Answer 1

driver = webdriver.Firefox()
checked - works for me

Answer 2

www.telerik.com/fiddler