Samsung galaxy odd security warning - grey screen with lock

[Scarlet B]

Hello, I am posting today about a security warning I got on my samsung galaxy a24 at 6 AM this morning.

I had set an alarm for 6, and it went off like usual. But when I swiped up to stop the alarm going, I got a strange screen error. The screen went grey, and a large lock took  up most of the screen with words along the lines of "Security alert / Security permissions." It vanished too fast for me to get a proper look, but I know there was more text and an action button.

I have been unable to find any other information on the internet, and so I've drawn a mock up of what the error looks like. Does anyone have any idea what this could be or mean?

Thank you!

[Fiona26]

Would it have been the accidental touch, looks like this. This can be turned off in settings > Display.

[Scarlet B]

Unfortunately that's not it. My phone was on my desk, and I only swiped upwards and then didn't touch it again  - thanks anyway!

[DanGnana234]

It is likely that you pressed the gallery icon

[Scarlet B]

I tried to test out the gallery icon error but it was not the same that I saw unfortunately 

[DanGnana234]

Oh ok

[Scarlet B]

Sadly that's not it - the lock was a lot bigger, and there seemed to be a button at the bottom - But thanks anyway!