"Behavioural issues" refers to problems or difficulties in how someone behaves or acts. It means that the person may have trouble following rules, controlling their emotions, or interacting with others appropriately. Full definition
She is particularly interested in helping parents of children with behavioural issues, or with diagnosed conditions such as anxiety, ADHD, ASD and so on. (sydneycoupleandfamily.com)
A majority of dogs handed over to shelters are left there because of behavioural issues appearing at some point during the dog's life. (breedingbusiness.com)
Perhaps you have already attended the seminars and you want help with a specific behavioural issue in more detail. (families.nsw.gov.au)