The software guys found it was a pretty rare issue. Thanks for reporting it. The behavior is caused by one of your boundaries having two or more points in the exact same location. In some circumstances (not all the time), this causes an issue inside the “rendering engine” generating the weird artifacts that you are experiencing. This minor bug will be corrected with the next version (TZT3 V2 / TZT2 V8). If you want a quick resolution with current software, you can go to the “Boundaries List” and for all boundaries that are either “Area” or “Line” press on “Edit Points” and make sure that there are no points with the exact same coordinates. Just tap on each duplicate coordinate and select “Delete” to only leave one point for each location. This will solve the issue.
