Bug ? Spreadsheet - scrolling change the selected columns

The problem:
(Note that in the screencapture, the selected cells change when I scroll (which cannot be seen))

The file:

Hello @arcqus

We are analyzing the issue. Once I get any news, I will inform you.

Hello again @arcqus

We have registered bug report based on this case.
The work on this is already in progress. Sorry for the inconvenience.