Already took them to Samsung center in local. It's hardware problem. It costs me about $300 for both S9 and S9 plus screen.
It's really suck. Never buy any flagship Samsung phone again.
Do you have a theme on your phone? If so, disable it and reboot, then check again.
I would also recommend checking for an update on your phone manually, as well as rebooting your phone and cleaning the cache partition.
Be very careful when clearing your cache partition ensure you select the proper option.
To find directions for this simply google "how to clear cache partition on *enter phone name here*"
Have you installed any apps when this started to occur? Do you have a case or screen protector that covers part of your front cam or sensors at all? When did this issue start?
Please let me know if you have any updates.
I'm using the default theme and already updated the phone to lastest patch. There is UAG case but nothing cover any sensor. Already cleared cache but still the same. It occured several days ago. This is my S9. Already hard reset on my S9 plus but still the same.
Coincidence that the same errors on my 2 devices.
Definitely not a coincidence.
Has there been anything new at all with your phones?
What is your service provider?
Are these unlocked phones or service specific?
What, if anything, had changed in the days leading up to when the issue began?
Any new apps? Any new settings changed?
Have you put your phone into safe mode to see if the issue continues?
I would highly recommend putting your phone into safe mode before trying the next step.
Would you be able to back up your phone and then give one of them a factory reset?
Perhaps if that is successful you'd be able to narrow it down.
Both are unlocked phones. With S9 after alarm ringing and S9 plus is after changing a wallpaper while charging. Tried "Safe Mode" and "Factory Reset" already. Now I'm going to flash back Android 8.0 version to see as if hardware or software is causing this trouble.