On 26 January, Johnsson revealed he had been suffering from intense pain in the neck and shoulders, and he was diagnosed with two spinal disc herniations (allegedly resulting from years of headbanging), and he was at risk of losing the ability to perform live. As a result, the rock opera project was delayed and the band downplayed their sets of songs in concerts to allow Johnsson to perform. By 8 April, Johnsson announced he had been able to avoid surgery as his condition had improved through physiotherapy, and the band would resume performing at festivals by August, although he would have to play sitting. (by the beginning of 2018, though, Johnsson was able to perform standing up normally again).