Strobing while running Effect 37

So I am trying to do a Salute to Ukraine effect with a 7 LED spot light shining on a Ukranian banner.

I am using Effect 37 - Running 2. Primary color is Blue and the Secondary Color is Yellow.

Here is the command being sent to the unit:
http://192.168.1.97/win&T=1&R=255&G=255&B=0&R2=0&G2=0&B2=255&FX=37&SX=16&IX=255&FP=0&PS=16

Here is respone back from the controller

255
255
255
0
0
0
255
0
1
0
1
60
0
37
16
255
0
-1
0
0
0
WLED-Front-Spot
1

When the color tranistions to say Blue all 7 LEDs turn blue one at a time and stay on for ~ 4 secs but there is a quick flash of the lights every second between the color displayed and the secondary color.

Any thoughts

Cheers

Mike