Hi,
- Board View
- Group by multi-select field - e.g Area
- Type with connected type - Initiative and Phase
- Filter to only show parent type - Initiative
- Parent type ticket with multi-select field set to two Areas
- Connected type ticket with multi-select set to same two Areas
This works correctly so far, shows the Initiative with phases in both Area groups.
- Now add filter on connected field (Phase) to "match group"
Now the phases disappear. However, if I have only a single Area marked on the Phase, that Phase reappears.
It seems that the "match group" functionality does not handle multiselect correctly. Or I'm doing something wrong, which is more likely 
Thanks!