However, the IE mode feature wasn’t working exactly as expected for some new Microsoft Edge users, with even the software giant acknowledging that in some cases, it just stopped responding when a site displayed a modal dialog box.
On the other hand, not all devices were affected. Microsoft explained that it was all caused by cumulative update KB5014019.
Windows 10 version 20H2, Windows 10 version 21H1, and Windows 11 were all affected.
“After installing KB5014019 and later updates, IE mode tabs in Microsoft Edge might stop responding when a site displays a modal dialog box. A modal dialog box is a form or dialog box which requires the user to respond before continuing or interacting with other portions of the webpage or app. Developer Note: Sites affected by this issue call window… (read more)
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