Elon Musk's lawyers are currently in court-ordered talks with the US Securities and Exchange Commission (SEC), as they try to prevent the regulator from removing him from Tesla.
However, on Monday the controversial technology entrepreneur posted a now-deleted tweet about Tesla production forecast, saying that the electric car firm will make over 500,000 cars in the next 12 months.
A similar tweet in February led the SEC to argue that Mr Musk was in contempt for violating a settlement aimed at limiting his social media comments.
“I think the advice would be to put his mobile away as it’s causing enough problems," Will Walker-Arnott, senior investment manager at Charles Stanley told Wake Up to Money.
"Tesla has enough problems ramping up production, without tweeting on his phone.
“He's under a lot of pressure - at one point he set up production marquees in the car park to reach production targets."