After finishing their 2009 Viva La Vida tour, he said there were some 'bad vibes' within the band.
Speaking to Radio 1's Zane Lowe lead singer Chris said: 'When we came back from America last time we had some bad stuff happening in our group.'
The 33-year-old added that the band are currently working on songs for their fifth album for next year.
He said: 'We're going for it. We regard this as our last big shot.
'We had a lot of songs and we cut a lot of songs. It's quite brutal - especially if you're the person which brings the songs. Now we're close to what the album might be.'