the formula device is still classed by the devs as ‘highly alpha and experimental’. so there is reasonable probability it will crash your Renoise. that means you should avoid using it in any worthwhile track for the moment.
for some real-life experiences with the device in actual attempts at making tracks, check out the DDRC 23: https://forum.renoise.com/t/dead-dog-renoise-competition-round-23/33843