Spreadsheet: Freeze when copying all cells

[andischmandi713]

This issue is unique.

• I have used the search tool and did not find an issue describing my bug.

Operating System

Linux (DEB package)

Version information

Version 9.0.3.29 (flatpak)

Expected Behavior

All cells should be copied without freezing

Actual Behavior

When selecting all cells by clicking the top left corner (between column A and row 1), clicking right mouse and then selecting copy, OnlyOffice freezes and must be closed

Reproduction Steps

1. open empty spreadsheet
2. click on top left corner to select all cells in spreadsheet

3. hit the right mouse button
4. select copy

Additional information

There is also a short freeze when selecting a whole column and then copying, but it only lasts for a few seconds. This doesn't happen when selecting a whole row and copying it