I actually experienced the same thing last night with my Analog Four.
I wouldn’t really have noticed, except, because the delay effect timing was syncing to the fluctuating tempo, it kept on causing funny pitch issues on the delay.
I think that sometimes it might be worth setting the tempo separately on the Analog Four rather than syncing it.
Luckily, it’s possible to make the Analog Four sequencer respond to “Transport In” without needing the clock - too many manufacturers just lump sync, clock etc in one one/off setting I’ve found…