Marker in Easy Chart is shifted in print

A client has observed an error when he prints an Easy Chart, using the default button in the top right corner, on which he set a mark with the X-Trace mode.
The mark he sets always gets shifted forward in time in the print.
Here is a screenshot of the chart in Vision and then of the print, you can see that the mark get shifted by about a week.

As a workaround I found that by clicking on the chart with the right button and selecting “Save as…” the chart is saved in png and the mark is printed correctly.
Is this a known bug or is just a problem with my system?