Coinbase went haywire Tuesday night when the popular cryptocurrency platform began allowing users to trade bitcoin cash, a fork of bitcoin that’s supposed to be more scalable.

Shortly after trading opened, the price of bitcoin cash rocketed to a high of $8,500, more than double what it had been on Monday. The price that Coinbase displayed was also almost triple what was being quoted on other exchanges. The erratic jump, even by cryptocurrency standards, unhinged some jaws on Twitter and, as The Verge pointed out, led some to allege something untoward was afoot.

The suspicion, as TechCrunch noted, was that Coinbase employees or others who knew the change was coming could have stocked up on Bitcoin Cash through other exchanges before the company publically announced its addition to the platform. The fact that the price of the cryptocurrency was rising in the hours before the announcement could be a sign that people were trading based on insider knowledge. It wouldn't legally be considered insider trading because cryptocurrencies aren't securities, but the allegations, if true, would raise many questions about the company's trustworthiness.

Four hours into Bitcoin Cash’s whirlwind debut on the platform, Coinbase temporarily ceased transactions for the cryptocurrency until around noon, leading to additional indignation on Twitter.

On Wednesday, CEO Brian Armstrong disclosed on Medium that there would be an investigation into the allegations. The company had apparently banned employees and their family and friends from trading in Bitcoin Cash more than a month before the launch. Armstrong wrote, “If we find evidence of any employee or contractor violating our policies—directly or indirectly—I will not hesitate to terminate the employee immediately and take appropriate legal action.”

Coinbase users have long been calling for the platform to add Bitcoin Cash, now the world’s third-biggest cryptocurrency, to its roster after it initially shunned the launch of the offshoot cryptocurrency in August. Coinbase’s Bitcoin Cash announcement on Tuesday seemed to steal the wind behind other cryptocurrencies, as values for Bitcoin, Ethereum, and Litecoin dropped at around the same time.