Most likely sabotage at this point. Too many derailments as of lately.
Sabotage is IMO the main reason why they keep things quiet in Ohio.
There is no conspiracy.
This is just the state of the North American rail industry at the moment. They are squeezing every last ounce to make money.
Since the 80's we have seen mass privatization in Canada, and in the whole continent as a whole, an overall trend towards deregulation and removing government oversight.
Unionized senior staff are early retired to save money and replaced with less experienced and cheaper recent hires.
Another poster pointed out the prevalence of "Precision Scheduled Railroading" as a contributing factor
PSR was pioneered by Hunter Harrison who was a railway executive all over North America until his sudden death, which means large Rail networks all over the continent have adopted this practice
Bill Ackman, "activist" investor, started a shareholder revolt to get Hunter Harrison installed as CEO at CP railroad in Canada. His only goal is to make money for himself, he's not going to worry about safety.
As pointed out by
@Atomicfrog, in Quebec, there was a huge explosion which basically destroyed a town in Canada