On the iframe scroll bar problem under ie, remove the event question?

A question I was asked by the back end a few days ago, because the background page is compatible with ie8, it should be carried out under ie.
gives iframe a move-out event, which is triggered as soon as the mouse moves over the scroll bar when the mouse is moved out of the iframe. How to solve this? It"s no use putting a div on the outside of iframe. Google is normal. Is this a question of browser differences? How to solve it.

Mar.05,2021
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