many technical jobs are vocational in nature as it's impossible to turn it off after work. As long as it's not affecting your personal life & work life balance (and not affecting your friends and relations) then you are very lucky. Most people don't enjoy their work so you're in a good place. Importantly though, don't feel obligated to do work problems on your own time and don't let management expect it. Only do it if you want to.
I like the saying "give a man a job he loves and he'll never work again". it's been true for much of my working life.