Screen glitchy when locked

[aliogul]

Hi,

I am experiencing a very strange issue with my s21 ULTRA screen.

When the phone is locked, and i m trying to unlock, sometimes the screen looks like the picture below. It is around the finger print sensor, basically almost half bottom of the screen is like this for less than a second and disappears immediately. 

I only see it when i m raising the phone to unlock, and when i m about to put my finger, i see this. It doesnt happen all the time. 

Anyone knows why? 

[Tsogo_sam05]

Hi, aliogul we apologies for the inconvenience caused, kindly turn your device off and on again. 

Monitor the problem, hopefully, it was just a minor software glitch.

If the issue continues then get back in touch with us and we will advise you on the next steps to follow.

[aliogul]

Thanks for the reply, i m sure i turned it off and on again and still faced the issue,but will do again and monitor

[aliogul]

Still happening

[Tsogo_sam05]

Hi, aliogul kindly note that your device may need to be booked in for an assessment. Please go to the below link to locate the closest Authorized Service Center to you.

https://www.samsung.com/za/support/service-centre/