This happens only in the building marked on the map and when the radio is in this {F3887551}room:

I have reported on this in the past as well. It's not just this building. You can do this in many different places, including getting inside of inaccessible attics. You can also have a radio set inside of a building that will spawn you outside of it. It's rarely used and abused right now, but the second radios starting getting more serious use and more competitive players start finding more interesting places it's going to become a much bigger issue.

Maybe relates to T180578