iris is not functional for some apps like paytm etc after the December Update

[Venu93]

IRIS is not functional for some apps like Google Pay, Paytm etc after the December Update. It is showing that "Couldn't verify Irises" 
Anyone else is facing this issue?
How to solve this? 

[theKeshavKr]

Are you using OneUI beta?

[Venu93]

Nooo.

[Anonymous]

what

[karansingh005]

There is an option in Galaxy Members app for checking biometrics of your device under maintenance. That may indicate a problem if you're iris scanner has one.

[Venu93]

It is showing normal.

[karansingh005]

Then there may be issue with software. Which device are you using?

[Venu93]

Note 8 Indian version

[Venu93]

hard reset resolved the issue🙄

[BrownFox]

what is hard rest?