F4v3 Differential Board Freezing

[charbaugh]

I have an F4v3 with 2 differential receiver boards - 1 is the old style (not-smart) and 1 in the new smart receiver.  I have the smart receiver configured in non-smart (traditional) mode.  The controller is on the latest firmware, v2.55.  On the smart receiver, on one of the ports I have my ground border, which is 67 pixels, and then 7 arches, 20 nodes each, tied into the end of the ground border.  The problem I'm having is the arches from time to time freeze/lag a bit then catch up.  it only appears to happen when I have some fast occurring on them (i.e. chase back and forth to the beat of the song).  I have the exact same setup, only fewer pixels (50 pixels on the border and 3 arches) on the other side of the driveway, and they work fine.  Those are tied into the original receiver board.  Everything in my display is hardwired, and the distance between F4 and receiver is about 60'.  I'm using xSchedule to run my program.

Any ideas on how to get rid of this lagging?