@Daniel bug exists in default 20.04 which uses Gnome.
Then I installed Kubuntu Desktop through Synaptic package manager. Started using Kubuntu through login session option, replacing GDM with SSDM. In such a case, no keyboard freeze occurs.
In short,
Download the latest Ubuntu 20.04 ISO from Ubuntu.com and do a fresh install of 20.04, the bug exists.
@Daniel bug exists in default 20.04 which uses Gnome.
Then I installed Kubuntu Desktop through Synaptic package manager. Started using Kubuntu through login session option, replacing GDM with SSDM. In such a case, no keyboard freeze occurs.
In short,
Download the latest Ubuntu 20.04 ISO from Ubuntu.com and do a fresh install of 20.04, the bug exists.