Konqueror & qtwebengine: cookies problem

Project:Linux software
Component:Documentation
Category:bug report
Priority:normal
Assigned:Unassigned
Status:active
Related pages:#11225: Konqueror rendering engines
Tags:cookies, konqueror, qtwebengine
Description

I experience regular problems with cookies with Konqueror and qtwebengine.

Sometimes, I am logged in a web site within a qtwebengine window, but not within another.
Some cookies seem to expire much quicker than they should.

The cookies backend is not the same as for khtml.
What is the back end? Where? How can I manage and see cookies?