M150 X too Low 3.3b2 + SBC

[jay_s_uk]

Running 3.3b2 on a mini5+ in SBC mode.
I have a fysetc mini 12864 display attached.
This line used to work (it sets the colour on the neopixels on the display)

M150 X1 R255 U255 B255 S3   ; set all 3 LEDs to white

Now I get the error Error: in file macro line 66: M150: parameter 'X' too low
This was working fine on 3.3b1

[dc42]

Thanks, I confirm that you've found the first new bug in 3.3beta2. Try sending the command without the X parameter.

[pkos]

Actually, this was already there in 3.3b1

Running it without the X goes through, but there's no backlight.