I have just purchased a Titan One and connected it to my 3 Showtec LED Par 56 Short Eco fixtures. I added the 3 fixtures like this: In Titan One: Patch, Fixtures, Showtec, Led Par 56 Short, 6 DMX.
Quantity = 3, DMX Line = 1, Address = 1, User Number = 1, Legend <blank>, Patch Showtec LED Par 56 Short.
The 3 Showtec LED Par 56 Short fixtures are set to DMX address 1, 7 and 13 as per the manual:

I checked the Personality online and the channels are identical (although channel 5 has a different description, but strobe and shutter do the same):

In Titan One they now look like this:

I also added a colour preset like this (multiple settings pasted in one image):

But strangely, as I select one or more of the fixtures, click a colour preset and set the dimmer to 100%, they do a fade in from 0% to 100%, drop to 0% again and start the fade in again. Mode is set to RGB, not 7 Col Fade or 7 Col Change. Doing a RAW DMX from 0 to 63 in Mode (which should set it to RGB) also has no effect.
Also the Dimmer setting doesn't seem to dim (I can set it to 0, but anything from 4 and up sets it to 100%). And the 7 Col Fade only fades the current coloour, 7 COl Change works as expected.
I am puzzled, the personality looks fine but the fixtures do not work as expected... What am I doing wrong here?
Note: using the fixtures with a hardware controller (Showtec Led Operator 1) works fine.