From June 2019, you will be able to configure the Design Issues Grouping using the Statuses configured for the Design Issues.
1. To configure the groups, go to Publication Space
2. Settings
3. Design Issues tab
4. 
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Configure the Group Name
1. Click on Edit on the group button
2. And from here you can edit the Group Name and Click Save
3. 
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Configure a Status against a Group
1. After clicking Edit for a particular group
2. Select the statues that you want to add to that group
3. Then Click save
4. 
Once these changes are made, the Issues tab will use these groupings to Filter the design issues on the Document Details page
