(Issue also exists in LibO 4.3.3.2)

Problem description: 
Once you have created one or several matrices of cells in a spreadsheet, you cannot add or delete rows anywhere between the first and the last row of any of the matrices. You cannot even insert several rows at once right above a cell matrix (as soon as the selection before the insertion makes you select some rows of the matrix).

To perform the row insertion/deletion, you have to select every matrix of cells, delete their contents (especially the matrix formulas), do the insertion/deletion, and recreate the matrices from scratch (assuming you copied the matrix formulas somewhere else before deleting them).
When the spreadsheet contains a matrix of several hundreds cells (or worse, several such matrices), this is quite painful and user-unfriendly.

How to reproduce the issue, starting with an empty spreadsheet:
- Check step: select rows 2 to 4 and right-click on the row number column: "Insert Rows Above" and "Deleted Selected Rows" are part of the pop-up menu items. This is OK.
- Check step: select rows 3 to 6 and right-click on the row number column: "Insert Rows Above" and "Deleted Selected Rows" are part of the pop-up menu items. This is OK.
- Now, select cells B4 to B8.
- Type "=1+1" then Ctrl+Shift+Enter. Note that from now on, when current cell is B4, B5, B6, B7 or B8, formula in formula bar is shown within curly brackets ("{=1+1}").
- Select rows 3 to 6 and right-click on the row number column: no more "Insert Rows Above" and "Deleted Selected Rows" in the pop-up menu. This is not OK.
- Select rows 2 to 4 and right-click on the row number column: no more "Deleted Selected Rows" in the pop-up menu. No more "Insert Rows Above" either, despite the fact inserted rows would be outside the cell matrix anyway. This is not OK.

Note that changing the setting "Tools > Options > LibreOffice Calc > General > Extend references when columns/rows are added" does not change anything here.

Expected result:
Row insertion/deletion should be possible within or right above a matrix of cells.
Note that Microsoft Excel allows inserting/deleting rows in cell matrices, and it properly extends formulas within them.