Tap feedback persists on tab bar and event listing cards

[stevecottle]

Description of issue

When I tap an icon on the tab bar the icon box turns grey.
When I tap a second icon on the tab bar the second icon box turns grey, while the first grey box persists.
When I tap a third icon on the tab bar the third icon box turns grey, while the first and second grey box persists.

Note: This bug can be recreated on a Pixel two in Battery Save mode. Operating system slowdown seems to be the cause of this issue. Expected behaviour is still for the grey box to not persis through navigation

Expected behaviour

When I tap an icon on the tab bar the icon box turns grey and the grey fades away.

Steps to reproduce

Tap the tab bar icons

OS / Browser / Device model

Pixel

Screenshots

** This happens on event list too.

[abinocoe]

I'm getting the same behaviour on Pixel, but only on the second time I tap an icon