Why is my S9 and S9+ now randomly jumping ahead 4 hours after Android 9 update?

[Android Central Question]

I have a S9 and S9+, on Verizon Wireless, which were working fine. At the end of January or first of February, both phones updated to Android 9. After the update both phones would randomly jump ahead 5 hours. There was no specific reason for this to happen and even happened when miles away from home and phones separated by distance (so, home wifi, local tower, phones in close proximity, etc. are not the cause). Once daylight savings time occurred, now they randomly jump ahead 4 hours.

Of course neither Verizon or Samsung have ever heard of this (I should play the lottery because i have the only 2 phones out of millions with this issue!!).

I have worked with Verizon and Samsung to troubleshoot/solve the problem from factory resets, Verizon looking at towers, nothing has worked. The issue even occurs without a SIM as a factory fresh reset. I sent my phone off to Samsung and for some reason the ticket states the PBA was replaced because my wireless charging wasn't working (IT WAS - THAT'S HOW I CHARGE) and the NFC not working.

Received my S9+ back after a week at Samsung and within an hour the time jumped 4 hours ahead. OBVIOUSLY, the issue was not fixed by Samsung.

Has anyone experienced this? Suggestions? It's really weird both my S9 and S9+ were affected by this.

Thanks,
Tony

 

[belodion]

Moved to S9 for comments from users.

 

[lucianus_luciferus]

Is the date and time set to automatic?
If yes have you tried manual settings and make sure you set the time zone correctly.
Then set flight mode on and see if it happens again.

 

[Ken Ascher]

My Note 9 on Verizon has the identical random four hour ahead issue that you described. I am not on the border of a different time zone. Verizon technical support did not have a solution that fixed this issue. This random ime error screws up the calendar and wake up alarms. This makes my Samsung Note 9 by Verizon unreliable and useless.
Ken