Scroll down DIV element with dynamic content replacement

Hi,
I have problem with scrape alerts list on popular charting platform TradingView.com
Alerts are placed in div, and depending on resolution of screen and click and drag layout shows about 15 alerts. User can have 400 alerts. Site replace in code visible alerts during scroling.
I tried Scroll Down with "scrollElementSelector" and make scraper scroll div with alerts, but It scroll down two times in normal way than fast scroll down until near end. Data preview shows only smal part of data.
Is there any way to scrape all alerts?

Url: http://tradingview.com

Sitemap:
{"_id":"tva","startUrl":["https://www.tradingview.com/"],"selectors":[{"id":"alert","type":"SelectorElementScroll","parentSelectors":["_root"],"selector":".list-21UyIlew div.item-2q7jpV7t","multiple":true,"delay":"5000","scrollElementSelector":"div.list-21UyIlew"},{"id":"name","type":"SelectorText","parentSelectors":["alert"],"selector":"div.name-2hHE8Mv3","multiple":false,"regex":"","delay":0},{"id":"ticker","type":"SelectorText","parentSelectors":["alert"],"selector":"span[data-name='alert-item-ticker']","multiple":false,"regex":"","delay":0},{"id":"message","type":"SelectorText","parentSelectors":["alert"],"selector":"div.description-2hHE8Mv3","multiple":false,"regex":"","delay":0}]}

Site code:

Video: Video how it looks like
Video: Dynamic content replacement

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Where is the alerts list? Please provide a link or screenshot.

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Alerts show on right toolbar when you click clock button. You have to be logged in.

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