Disable 'Current' node in Sitemap

I am experiencing the following error if I click the 'Select Management Agent' link in the breadcrumb while editing an existing Operation in an operation list.

Server Error in '/' Application.
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The resource cannot be found. 
Description: HTTP 404. The resource you are looking for (or one of its dependencies) could have been removed, had its name changed, or is temporarily unavailable.  Please review the following URL and make sure that it is spelled correctly. 

Requested URL: /Operation/CreateRunProfileOperationSelectManagementAgent


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Version Information: Microsoft .NET Framework Version:4.0.30319; ASP.NET Version:4.0.30319.272 

Reproduction steps are:
1 Navigate to the Operations Page
2 Open an existing Operation List with at least one configured Operation
3 If required, stop the Operation List
4 Select an operation of type 'Run Profile' (Runs a FIM MA) and choose 'Edit Operation'
5 On the 'Select Management Agent' page do not change the Management Agent. Hit 'Update'.
6 On the second 'Select Maangement Agent' page (where run profile information can be supplied), at the breadcrumb near the top of the page click 'Select Management Agent'. See attached screnshot

Expected Outcome: A page loads

Actual Outcome: 404 Error

Not: I havent tested this when creating a new management agent operation from scratch. Since a similar/identical page loads, the error may or may not occur there also.