After upgrading to version 5.2.19.918 it is no longer possible to open a new report or edit an existing one with the designer deployed through the ClickOnce technology. The issue reproduces also with version 5.2.19.1011.
The Service Agent is supposed to be notified and wake up from its sleeping cycle (180s) when a scheduled task is executed immediately. Sometimes this does not happen and leads to reports being executed with 180s delay.