Currently report to manager (Mr. X)
But work for two other managers (Mr. A & Mr. B) on seperate projects
Previously, I reported and worked for Mr. A
I approached someone at an external company on LinkedIn who worked at GM before. He asked me who I worked under. I said Mr. A (as his team works on same tech as this external company).
This external guy contacts Mr. A and later Mr. X to get a recommendation. Mr. A gave a positive feedback and Mr. X had to do the same. But now Mr. X is holding it against me and giving me hard time.
Is what I did a big deal?
Dont reach out to people close enough to harm you on linkedin. Go to the hr folks at some company if you are interested. They know not to screw a candidate or let a HM screw a candidate.
If you were not looking hard for a new job, start now.