When we change Epics quarterly plan, user stories are being lost on the way

When we move Epic from one quarterly plan to another, if we drag them, it asks should the linked user stories be moved as well. However, if we simply change quarterly plan name in the field, user stories are not being moved. Same issue appears if we move epic from one workspace to another. User stories are being lost on the way. Please can this be changed, to ensure, that when we change Epics quarterly plan, user stories are always being moved accordingly. Thanks!