Led fade in problem

Good day,

I've got a problem with some elation ePar Qwash. Total i have 16 led par's.
I have made 1 list with some color's for example : 16 led par all blue,green,orange....

And i have made 1 list with just 8 led pars that have the same colours. This is a chase that is going over the main list.

When it's going as a hard chase this works just perfectly. But when i make it some slower something strange is happening. Because at the end of the chase the fade out time looks shorter than the fade in time. So it's looks like it's jumping back to the original colour instead of fading. because of this the whole chase looks like it have a strobe in it every cue.

I hope that someone of you can help me. And that you understand my problem.

Thank you,

Greets,

Dennis