Yup, both pitch change and reverse will introduce clicks because the play head of the granular sampler will keep overlapping the record head of the looper. Has been an issue with sharing the a looper buffer that’s recording with any type of sampler that messes with the speed
If you freeze the buffer you’ll notice the clicks go away as well. Maybe a longer buffer is needed to reduce the clicks. I’ve had some luck with different filter settings that filter out the clicks…though that was more by accident.
Might be able implement the grain stretch unit for pitching and reverse, but I haven’t tested it with a shared looper buffer yet.