Fix grouping issue

When switching to a group that is not shown currently, the group headers
won't be updated. The root-cause was that the m_groups-cache must be reset
when the roles have been changed.

CCBUG: 289654

1 files changed, 1 insertions, 0 deletions

diff --git a/src/kitemviews/kfileitemmodel.cpp b/src/kitemviews/kfileitemmodel.cpp
index 0d851dcd9..3fd40e9d4 100644
--- a/src/kitemviews/kfileitemmodel.cpp
+++ b/src/kitemviews/kfileitemmodel.cpp
@@ -367,6 +367,7 @@ void KFileItemModel::setRoles(const QSet<QByteArray>& roles)
         }
     }
 
+    m_groups.clear();
     resetRoles();
 
     QSetIterator<QByteArray> it(roles);