Have you guys gone through a experience where, you pass so well that when you come out as trans to people, they think you are , in good faith, transitioning to the opposite direction?

To illustrate this, imagine this dialogue.

A is a transgender person who already transitioned both hormonally and socially, gender conforming enough to "pass", but never revealed that they are transgender to B.

B is a supportive ally who met A already transitioned and to this point never knew that A was actually transgender but was a cis person of their gender instead.

A comes out to B

A: so...I must tell you something.

B: what is it?, you seem pretty worried.

A: It's not something I get to tell much but I think I trust you enough for this.

B: Okay...

A: I am trans.

B: Oh.

A: ... are you mad?

B: Nah, that's okay for me, so what name will you use, should I use "old pronouns"?

A: huh?

B: Did I say something wrong or weird? (actually unaware), I heard that trans people transition to the opposite gender.

A: oh...

A: ...I already transitioned, B.

B: OH FU-

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Have you passed through that type of situation or something similar?

I hope that I worded it well.