[Python] Why does the driver open two tabs by one click?

I am trying to reach pages by hrefs nested to web elements. But the driver gives me two identical tabs when it click() on the href. It turns out that three tabs are open at the same time. Duplicate pages confuse further work with html. How can I get only one new tab by click?

Python 3.11, PyCharm

chrome_options = Options()
chrome_options.add_argument("--headless")
driver = webdriver.Chrome()
driver.get("https://upn.ru/kupit/kvartiry")
title = driver.title
print(title)

wait = WebDriverWait(driver, 5)
original_window = driver.current_window_handle
assert len(driver.window_handles) == 1

b_block = driver.find_element(By.CLASS_NAME, 'main-container-margins.width-100').click()
wait.until(EC.number_of_windows_to_be(3))
for window_handle in driver.window_handles:
if window_handle != original_window:
driver.switch_to.window(window_handle)
break
title = driver.title
print(title)




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