I've come across what appears to be an error when uploading xlights configuration to a Falcon controller on the output side. In my example I created a 32 strand mega tree with 50 pixels per strand. I divided those 1600 pixels into 8 strings of 200 pixels, so the xlights mega tree config is 8 strings, 200 nodes and 4 strands/string. The controller connection is set to port 1. If I upload the output to my F16 it configures properly showing the first 8 outputs on the F16 as 200 pixels each.
The problem arises if I add a star (or other model) to that setup for a tree topper. The star is set to connect after the last pixel of the mega tree, so I add the default 50 pixel star with a start channel set at the end of the mega tree and a controller connection to port 1 and upload that output configuration to the F16. On the F16 it shows port 1 with 680 pixels (should be 200) and the rest are all 200 (port 8 should be 250). So it seems that adding a model that connects to the end of a mega tree that spans multiple ports introduces an output uploading problem.