The original script has been updated to an unavailable version, so it appears, rolled back to the available version.
Relavent topic link: https://techcommunity.microsoft.com/t5/microsoft-bing/search-page-of-bing-automatically-jumping-to-the-top-of-page/m-p/3501382
Relavent script link: https://greasyfork.org/zh-CN/scripts/461790-fix-for-bing-search-returns-to-the-top

AwayTimeThreshold defines the waiting time in seconds when the tab is no longer active to scroll up the page. (Default value: 15 seconds, and 2,592,000 seconds mean One month.)