Any limitation to select processes in the process reporting tab when using process based search. Normally we can select complete folder to get executions but you won't see all the executions. Either it will display no result or it is continuously searching for processes.
You are not able to select too many process(it might work up to 15 processes) in the process reporting when using process based search.
This is because the query string that gets generated on the back end for the filters & it becomes too large and blows up.
We have created JIRA for this issue & we will update our help document & also we will try to produce an error, if user select more processes in the process or we will restrict not to select more processes.