FX - " Select track clock " Question

[CarmeloP]

A clock change happens when a pattern is ready or on break. So even if you put it on the first step, it should apply when the pattern is finished.
Not sure why it should already change on step 4.

Putting ir somewhere at the end of the pattern is something i would do indeed

Yes I found it strange too
But putting the FX on the last step it works find. 
That clock change per pattern is such a good thing.
Thank you !