My phone can be unlocked without ask any pin or fingerprint ! (bug)

[SPeaky]

This happens at least once per day and I don't know what to do.I press the power button and phone skips the lockscreen,going to directly homescreen.If someone takes my phone and this happens,it can be really dangerous.Is it an Oreo bug and what should I do? As I said,it happens 1-2 times per day (max 2 times) but still a serious bug 

[najodleglejszy]

@SPeakygo to Settings > Lockscreen & Security > Smart Lock and see if any of the settings there is enabled.

[SPeaky]

Actually I deactivated smart lock from trust agents in security section.So smart lock is disabled in my phone.So that means this is a bug and developers should notice that because strangers may use this bug and this is a clearly security weakness

[Strampke]

Are you sure you didn't activate any of these?

[SPeaky]

Actuallt can not see the image you sent.Is it possible to write 'these'? @Strampke

[najodleglejszy]

@SPeakyyou should now be able to see the image.

[SPeaky]

As I said,none of them is enabled(in fact smart lock is disabled completely).I think this is a really serious bug,pls developers notice this

[Strampke]

Please read this Google help page

and see if you can find a clue.

Start with Turn off automatic lock

Then switch off screen lock and after that set up screen lock again.

[SPeaky]

Thanks for the assist but only after 5 minutes from doing that,happened again by chance(not happened again during all day though)As always,happened today just for one time(in the morning).I will try some other things but I have no hope,actually.As if it has to be happened at least one time per day Phone opens suddenly without asking any pin or fingerprint. 

[admad]

I know it's a stupid question but are you sure that while pressing the power button phone isn't reading your fingerprint?

Another possibility is that the phone isn't actually locking itself so there is no need to unlock the phone, some app/setting might be doing that. Anyway for the seven months I've been using this phone never had such issues.