[Dan Le foot]

Hi folks.
I bought new Chorus brifters and derailleurs about 5 months ago for my Kish gravel bike.
Im having a problem with the right shifter. It shifts up (to larger cog) fine. But when shifting back down it gets jammed about half the time. To unjam it I have to shift back up one or more times before it will shift down. The cable does not look kinged. Bottom bracket lead is clean. I trimmed the hood a bit to allow the thumb paddle to return smoothly.
I have had problems with the return spring on Campy shifters in the past. I hope that this is not a problem on this new shifter.
What do you think?
Thanks.
Dan