Quite a bit, but Wikipedia provides sources! So I checked [0].
In section 3.3 it says that GSK argued their patent on the new form was being infringed because "there were batches of anhydrate that converted almost entirely into hemihydrate when stored at 40 °C and 75 % humidity within one month."
So "if you keep it wet and warm it will partially convert over the course of a month", and as far as I can tell the "seeding" aspect was not clarified, at least not in the article.
Also it bugs me that the Wikipedia author decided to call the loss for GSK a "technicality". It was decided that it was not relevant that microscopic quantities of the new form were created by accident, I think that is the correct decision and not a technicality.
In section 3.3 it says that GSK argued their patent on the new form was being infringed because "there were batches of anhydrate that converted almost entirely into hemihydrate when stored at 40 °C and 75 % humidity within one month."
So "if you keep it wet and warm it will partially convert over the course of a month", and as far as I can tell the "seeding" aspect was not clarified, at least not in the article.
Also it bugs me that the Wikipedia author decided to call the loss for GSK a "technicality". It was decided that it was not relevant that microscopic quantities of the new form were created by accident, I think that is the correct decision and not a technicality.
[0]: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4479028/