Windows 10 Will not obey "Display Windows side by side" command

Hello everyone,
Good Morning to all.
A few days ago one of my colleagues told me about his laptop, He said he is facing some issues on his laptop, so yesterday I saw his laptop and the problem is Windows 10 will not show windows side by side on the right-click Task Bar command.
In Windows 7 when he had 2 panels open and he wanted to display them side by side, he would go down to the taskbar right-click and select “Show Windows side by side”
Now after upgrading to Windows 10 Pro when he does this he finds that the panels are stacked one on top of another contrary to the instruction.
then experimented with “Show windows stacked”, and in fact, that is what it does.
So now the problem is that Windows 10 will not display panels “side by side” when that function is selected.

Any ideas to fix this?
WhatsApp Image 2020-09-05 at 10.28.46 AM