Steps to reproduce: 1. Open a spreadsheet 2. Click on a cell 3. Type something in that cell 4. Used the mouse to go to the menu File > Save and click it. Note: after editing the cell don't click on something else, go to the 'save' directly. Expected result: Cell contents were saved. Actual result: Cell contents not saved.
Alexandru Vlăduţu committed a patch related to this issue. It has been pushed to "master": https://git.libreoffice.org/online/commit/91175c854af80ef35ee3e7a8227600e56b1cb8d6 tdf#130103: loleaflet fix save from menu for spreadsheets