when you find bug in production code example

Example: what if bug in production

Initially we need to check if the issue reported in
    Prod environment is a valid defect. If so:
	Than first of all I am trying to keep calm
    because whoever tested might be in a big trouble :)
    I reproduce the defect to check whether if error
    occur on my end aswell or is it because of 
    users error or configuration issue.
    If also gives an error on my end than I would
    go more into detail to check whether if it is
    only occur in specific browser or if I need
    different configuration etc.
    So while developers find the solution as a 
    tester I would try to find root cause of this
    issue. So before developers apply hotfix sometimes
    we need to also check since it is in production
    enviroment and if fixing the bug might lead other
    defects in the future. it could be even worse.
    So basically we need to brainstorming as a team
    to check how to apply hotfix.