It might be a bpm issue, some vstplugs don’t know how to sync the timing to Renoise if the real bpm is not rounded.
See also tip&trick topic:
https://forum.renoise.com/t/v152-table-true-bpm-matching-user-bpm-at-speed-6/17876
This last problem should be resolved in the Next Edition, there might be a big chance those plugs will work in Next Edition as well for other vst related bugs that got fixed.