Same here. Every time I open the app there is a difference in Zulu of 6 or more hours, instead of 2 hours that is my (winter) time zone.
In the pic below, PC time is 12:00, time is correctly shown in time bar, however Zulu time shown is 03:00Z, instead of 10:00Z, a 7 hour difference.
I found that going to settings and toggling Zulu time off then on will usually fix this issue, but sometimes it has a daylight saving +1hr added as well, when it should not.
Edit: moving the time bar backwards and forwards completely messes up Zulu time. Started with correct 2 hour difference, went a bit forward then back to the same time, now difference is 10 hours. Also, advancing 1 hour local time does not always advance Zulu time by 1 hour. In short, they are out of sync.