[Qtwebengine] Debugging issue with QWebEngineView freezing on Qt 5.12.3

[Thuan Seah Tan]

Hi all,

We are currently migrating our software from Qt 5.4.1 to Qt 5.12.3 and
encountered an issue where the QWebEngineView would freeze (i.e. not
responding to mouse click on links but still responding to window resize)
but the main application thread runs fine.

Currently we suspect it has something to do with how we handle drag and
drop. I am trying to debug this in Visual Studio 2017 and there are a
number of Chrome threads which I can't inspect the callstack for. They all
seem to be external code for some reason. Beyond that I don't see any
thread that could be related to QWebEngineView. Can anyone provide some
assistance as to how to troubleshoot the freezing issue?
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