Hitting/clicking back using system navigation/gesture won't go back to previous menu

How to reproduce:-

You need to have the new achievements screen to reproduce this bug.

*Make sure you are using system navigation/gesture

*Have the new achievements screen

1 Open profile and check achievements

2 Now go back using the system navigation bar/gesture

Observed results:-

After hitting back button/ swiping on the screen to go back, it doesn't accept it.

Expected Results:-

It should accept system navigation/gesture uses to go back to previous menus.

Video of the bug is provided.

Workaround

A workaround to this bug is to use the back button in the top left corner of the screen. But in some/most mobile devices, their screen has a curve border overlap the icon which can annoying to hit/tap.