Scrape script when deployed on heroku not giving expected outcomes

[alok001]

Well i did some debugging and found when executing from heroku , the page is not getting scrolled. Added new method to scroll. Can somebody please suggest.

def scrollDownUp(driver,elm):
    last_height = driver.execute_script("return document.body.scrollHeight")

    while True:
        # Scroll down to almost the bottom of the page
        driver.execute_script("window.scrollTo(0, (document.body.scrollHeight-600));")

        # Time Taken to Load the page
        time.sleep(7)

        # Scrolling Up & Down to load more Data
        elm.send_keys(Keys.HOME)
        time.sleep(4)
        elm.send_keys(Keys.END)
        time.sleep(3)
        print('last height ', last_height)
        # Calculate the new scrolling height and then compare it to old height
        new_height = driver.execute_script("return document.body.scrollHeight")
        print('new height',new_height)
        if new_height == last_height:
            break
        last_height = new_height

local machine

Output:
last height  3531
new height 6601
last height  6601
new height 7825
last height  7825
new height 7825
38 - 38 - 38 - 38 - 38

from heroku console

Output:
D:\Scapper\webscapper>heroku run python FlightScapper.py
Running python FlightScapper.py on ⬢ webscapper... up, run.3818 (Free)
.......
last height  2606
new height 2606
0 - 0 - 0 - 0 - 0
...............best flight...............
Empty DataFrame
Columns: []
Index: []
called made