This issue is started happening after installing Internet Explorer October and November Cumulative Security patches (MS15-106 and MS15-112) for Internet Explorer 11.
When editing a report, after installing this MS patch, causes IE to hang and eventually crashes or prompts for recovering the page.
Steps to duplicate:
1) Begin with IE 11 installed with any security update prior to October 2015.
2) Edit any report
3) Save report
--Everything works fine
4) Install the October or November Cumulative Security patch for IE11
5) Edit any report
6) Save report.
--IE hangs, then crashes or simply doesn't save the changes
Note: This issue could be also tentatively noticed under other areas when trying to load pages like 'Jobs and Tasks' page or slowness when trying to edit or create a new item.
This is a known issue with Microsoft. See "Internet Explorer 11 consumes high memory and CPU cycles after you install update MS15-106": Microsoft KB KB3119070
This is not an issue with our product. It was introduced by recent updates in Internet Explorer. Please install the hotfix provided by Microsoft under KB3119070