alt Hacker NewsIANAL - if they break the bail conditions the judge may issue a warrant depending on severity, clearly a warrant was not issued here, otherwise there’s no need for pretext like you said.
Article also states bail jumping charge was dismissed but the weed charge is the only charge that remains.
They still have to bother with actually going to a judge and actually getting that warrant. Why do that if you can just skip it and not deal with inconvenient questions.