This is in general true. If people figure out that you're good at something, especially if it's something they don't want to do, then you'll be inundated with tasks involving that something. This can be a blessing or a curse, depending on how much you enjoy that something.
> If people figure out that you're good at something
I think it's more "if people figure out you'll do their work for them".
There's a different between (a) helping a colleague with advice/pointers and occasional hands-on help, and (b) independently completing core parts of someone else's job.
Similarly, in Harold and Kumar, the scene opens with Harold (John Cho)
working at his desk and packing up getting ready to leave. It cuts to a scene
with Harold’s co-workers, two white men, one of whom, Billy, is bogged down with
work and can’t leave the office at five p.m. One suggests giving the work to
someone else, and the scene cuts back to Billy’s giving Harold a stack of papers
and telling him, “I need you to update those models for me.” Harold responds,
suggesting Billy was the one who was supposed to finish the work, but Billy lies
and says he has to take care of other clients and doesn’t have time to get the
work done. After a long pause, Harold calmly agrees and says, “Yeah, no
problem.” As Billy exits the office, his co-worker states, “I’m telling you, those
Asian guys love crunching numbers. You probably just made his weekend.”
