Hi Fidrik,
Sorry about the inconvenience caused.
We would like to let you know that, the issue “DataMarker label not visible for single value in line series” has been fixed already and the fix for the issue is estimated to be available in our Service Pack release, which is schedule to roll out by the end of this month.
Please let us know, if you require further assistance on this.
Thanks,
Manivannan.E