I may be being dim here, so please be patient…

If you are not changing the tempo, why sync the looper to the MIDIclock at all ? It's crystal controlled (as they say), so should play back accurately at the same speed of the recording.

I'll look into the EHX, but we consider a totally accurate MIDIclock synched playback to be rather difficult. But, we would be including pitch change into this, so maybe we are making it more difficult than it needs to be.