Word to describe this behavior: applying your work habit even when you're not working?

For example: I'm an engineer on a vacation. When someone mentioned a machine that's broken, I can't help but join in an try to debug the issue.

If you automatically try to fix a problem when you're not at work because you're so used to always fixing problems when you are at work, the behaviour is called conditioned:

[Merriam-Webster]
2 : determined or established by conditioning

// But, really, people like Padraic — who, having been deemed too mad for even the Irish Republican Army, creates his own splinter of a splinter group — are folks for whom wholesale destruction has become a conditioned reflex.
— Ben Brantley, New York Times, "Orlando Bloom and Aidan Turner Are Drenched in Blood in London," 4 July 2018

In more applied terminology, there is an entire branch of psychology related to conditioned behaviour, and how that behaviour is the result of conditioning.

For instance, from "What is conditioning? What Pavlov's dogs experiment teaches us about how we learn." at Psychologist World:

Conditioning in behavioral psychology is a theory that the reaction ("response") to an object or event ("stimulus") by a person or animal can be modified by 'learning', or conditioning. The most well-known form of this is Classical Conditioning (see below), and Skinner built on it to produce Operant Conditioning.