It is the Dell Inspiron 5567
Memory: 8 GB
Processor: Intel(R) Core(TM) i5-7200U CPU @ 2.50GHz[Cores 2] [Logical/Core 2]
Operating System: Microsoft Windows 10 Home
with this configuration with backlight keyboard.
And this is the BIOS update I received last month : Dell Inspiron 5567/5767 KBL System BIOS - 1.2.6
via the Dell Support Assist application and the issue is being encountered since then.