Vivaldi browser crashes when trying to change an auto-assigned user of a task

Hi Quire Team,

I have found a very strange bug - Vivaldi browser (I use it everywhere, because of the many options it provides) crashes every time I click on a task name to change the auto-assigned user (me) to someone else ...

If the option "Automatically assign new tasks to myself" in Account Settings is changed to not checked - there are no problems assigning user to newly created unassigned task or even change the current user of an already assigned one until the browser is closed and opened again, after taht the same problem appears.

The only solution I have found till now is to uncheck the option "Automatically assign new tasks to myself" in Account Settings and the first time I open Vivaldi and Quire - click on some unassigned task to show the available user and after all is OK while session is alive.

I have tested with new installation of Manjaro with Vivaldi and even Vivaldi on Windows - the same problems - browser crashes, on Winodws - right away, on Linux - after 30-60 seconds.

I have tested even Google Chrome or Mozilla Firefox - there are no problems there, it only happens with Vivaldi browser. Please check, there is someting in the code of Quire or Vivaldi that trigers strange behaviour and system becomes unresponsive.