it's confirmed to not be a problem. splits perfectly fine and is left right in place in the dirt where you first planted it, still containing the spores too
good question get's a long answer. The nodes will just be proof that a symbiotic colony was established. The farther down the root system I can find nodes the better. Now to further discuss the matter.
The myco are not there to fix nitrogen into the soil. Legumes like clover and soy beans do that on their own and big agro just wants it to do it better, that's why you see 'pre-inoculated' clover seed and the likes. The myco assists nearly any living plant (80% of plant life on earth actually) to use nutrients. So it's just a different way of doing things, to me a far better way. One of the things I'm looking at is if the 1 Tbsp is sufficient or not for a 60 day grow cycle? Does the myco colonize fast enough or is that insufficient amount requiring soil amendments. I don't know but from my research it just might work. We all know how fast fungi can grow. Hope that addressed your question.