I encountered this too by accident:
DEBUG ASSERT: "index != m_currentEditedCellIndex" in function void PreviewButtonDelegate::cellEntered(const QModelIndex&) at /home/jan/Projects/mixxx/src/library/previewbuttondelegate.cpp:177
I encountered this too by accident:
DEBUG ASSERT: "index != m_currentEdited CellIndex" in function void PreviewButtonDe legate: :cellEntered( const QModelIndex&) at /home/jan/ Projects/ mixxx/src/ library/ previewbuttonde legate. cpp:177