Symptoms

Since updating to 4.6.11 and redeploying a process, we no longer see the options of "Redirect" and "Delegate" in the SharePoint worklist web part. How can I get these back?
 

Diagnoses

It appears that if the worklist webpart has a FIXED height, this issue will appear. Set to a dynamic height could fix the issue.
This ttest diden't work.

Please check if you have the same issue with the standard Workspace: Not the same issue.
 

Resolution

I checked the webpart properties and there was actually not a fixed height for the k2 worklist.
However, I deleted the worklist webpart from the page completely and then added a new one back and the Redirect and Delegate actions are now available again.
Strange but seems to be OK now.