I’ve also noticed @Jonny points with my Mangrove. After it’s been given an hour or so to warm up mine does seem to track well. The ‘pitch jump’ when plugging in V/8 really threw me for a while!
@weepwow If you’ve not checked it out yet, Plaits can do a lot of ‘complex’ osc stuff (wavefolding, FM etc.), and it’s rock solid tuning wise (joys of digital!).