Symptoms
Assume that you have applied Microsoft SQL Server 2012 Service Pack 4 (SP4), and then you create a SQL Server Reporting Services (SSRS) report. When you open the report by using Internet Explorer, you cannot resize the parameter drop-down list.
Cause
This issue occurs because of a regression in SQL Server 2012 SP4.
Resolution
Hotfix information
Hotfix for SQL Server 2012 SP4
A supported update is available. We recommend that all customers apply this update.
Status
Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.
References
Learn about the terminologythat Microsoft uses to describe software updates.