Same issue here. Just for clarification, it’s just the alerts in the task bar that show the incorrect times. The alert inside the app’s events tab displays the correct time and each camera shows the correct time.
Clearing app cache did not work for me. I suspect the problem will correct itself with time. I spent a week in a time zone that was +6hrs from home and noticed the issue. Then I spent a week in +7hrs time zone and now the alerts reflect that. Hoping 3-4 days in my home time zone will fix it.