Having Chrome 64 and Chrome Not Merged at Task Bar

I have both Google Chrome and Google Chrome 64 installed.
Having different 64 Bit version allows running them in parallel for 2 different profiles which is important feature.

An interesting thing is that on one computer the 2 icons are not merged on the Windows 10 Taskbar:

https://i.imgur.com/e90TK8x.png

Yet on other computer with Windows they are merged (Namely like having any other 2 copies of the same program).
It is not a Windows configuration as any other application is merged on my task bar (For instance if I launch Explorer++ twice).

I wonder, is it some kind of a configuration of the portable launcher?