Canopy Growth is the largest cannabis company in the world by market cap, and some investors were concerned that the company was acting in legally-questionable ways - especially in light of the blatant rule-breaking at CannTrust and Harvest Health's run-ins with regulators in its Ohio cannabis license applications.
In brief, Canopy Growth and an outfit called Go Farm Hemp ("GFH") had contracts for GFH to farm 1,115 acres of hemp in four states and to sell the hemp biomass to CGC for their New York hemp industrial park.
A dispute arose between the parties, with GFH alleging Canopy Growth stopped paying it and CGC alleging the GFH doesn't know how to grow hemp at all and was just siphoning off CGC's money to purchase a house in Panama. Both sides are seeking damages.
Read more at seekingalpha.com