Coronation Street spoilers have signalled heartache for poor Johnny Connor, who is serving out a sentence behind bars in Weatherfield's prison.The former barman was recently diagnosed with Charles Bonnet Syndrome, with doctors finding the cause behind his many hallucinations and strange behaviour.Johnny, played by Richard Hawley, also suffers from multiple sclerosis, a condition targeting the brain and spinal cord.Corrie spoilers have predicted Johnny's health will worsen in upcoming scenes, kicking off when fellow prisoner Kai accuses him of dealing drugs.Mistaking Johnny's MS medication for hard drugs, Kai is convinced he is trying to take over his own drug dealing empire in the local prison.