Bence asked had the same issue here:

Fortunately given solution worked for him but it didn’t work for me.

I wonder if different chrome option arguments and/or experimental options affect the other option arguments with selenium chromedriver.

Here my current initialization

from selenium import webdriver
from selenium.webdriver.chrome.service import Service

selenium_path = "path/to/file/chromedriver.exe"
ser = Service(selenium_path)
op = webdriver.ChromeOptions()
op.add_experimental_option('prefs', {
            'profile': {
                'content_settings': {
                    'exceptions': {
                        'clipboard': {
                            'https://someprivatewebsite/,*': {
                                'expiration': 0,
                                'last_modified': 1323640820415,
                                'setting': 1
                            }
                        }
                    }
                }
            }
        })
op.add_argument("--disable-usb-keyboard-detect")

op.add_argument("--disable-search-engine-choice-screen") # added to solve the issue

op.add_experimental_option('excludeSwitches', ['enable-logging'])
op.add_argument('--log-level=3')
wd = webdriver.Chrome(service=ser, options=op)

When I start chromedriver with selenium it still open choose default search engine dialog.