Usually with flickering lights, if the flicker is not visible within the software, it is usually a hardware issue.
Initial things to check is if the end of the DMX line is properly terminated to prevent signal reflections, and also that the common wire is seated properly in drivers/fixtures.
It could also be possible that there is an issue with the DMX interface. Could you try using universe 2 with the 2nd XLR port and see if the problem is still the same? You will need to adjust your showfile accordingly to run in universe 2 in the software.
If the problem persists, please report back and we will endeavour to assist you further.
Please note, for the most urgent matters, our technical support ticket system yields faster response times.You can raise a ticket here:https://store.daslight.com/signin . If you do not already have an account, you will need to create one.
Daslight Technical Support