There’s a big thread about zero node streets here: Street has zero nodes where I thought I fixed all this.
I notice that one of the streets reported by @Jason is in a city also updated on February 15th. I’m going to poke around in that code again - I have the idea that forced early exits are causing trouble (I use these during deploys, so I don’t have to wait for the full city update to finish – some can take 12+ hours).