Chrome Version       : 53.0.2785.116 (Официальная сборка) m (64 бит)
URLs (if applicable) : https://demo.dentplan.ru/?login=ddf1bba6302d01188073&section=expenditures
Other browsers tested:
  Add OK or FAIL, along with the version, after other browsers where you
have tested this issue:
     Safari: OK
    Firefox: OK
         IE: OK

What steps will reproduce the problem?
The demo version (wich not requires any registration) of our GXT-based application contains the form which causes the problem.
(1) Visit our website www.dentplan.ru.
(2) Click the orange button to start demo application (as shown in attached file). Every orange button opens one corresponding form after demo loaded, the 4-th button (located in "Контроль расходов" section) opens the form what causes a problem.
(3) You can open any form in demo application, but only "Расходы" form, which contains Tree component, causes a problem (as shown in attached file).

What is the expected result?
The form should open.

What happens instead?
Web application immediately and totally stops to responding.

Additional information:
The bug appeared when Chrome was updated to version 53.0.2785.101. The problem occurs only on Windows (all versions, I tried in 10, 7, Server 2008). In MacOS and iOS all works correctly.
Our web application uses Sencha GXT 2.3.1a and GWT 2.7.0. Bug appears in every form with Tree component. All other forms are working properly. When you tried to open a form with tree, page immediately stops to responding. After a little time a Chrome's standard dialog "Page not responding" is appearing. If a developer tools panel was open before, no activity displayed in it. After the effect happened, it become not easy to close tab in the top bar of Chrome.
 

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