Unable to delete multiple cells content when table in the page layout

Environment

Confluence server

Steps to Reproduce

1. Insert a table and fill all cells.
2. Select multiple cells
3. Pressing delete will clear all selected cells
4. Undo (all selected cells should be re-populated)
5. Add a Page layout
6. Select multiple cells
7. Pressing delete will only clear the cell where the cursor is

Expected Results

Same behaviour as without page layout. Select the content of multiple cells in any direction, pressing delete should clear the contents of those cells
 

Actual Results

Only clear the cell where the cursor is

Workaround

N/A

Notes

Screen recording on how to reproduce the issue
Screen Recording 2021-06-23 at 1.44.26 pm.mov