Trucks ignore the highest priority job (HI) and deliver to priority 1 jobs

Is it expected? See the attached screenshot and save file. Version: experimental b612. Load the save file and unpause the game.

Changed blue lab priorities to 2 and the problem went away. Hmm... Is HIGH supposed to be below 1 and above 2? 🤔

I think Urgent (Hi) is supposed to be like Prio 0, and additionally allows partial deliveries.
I ran it 4 times like having briefly paused all constructions, paused all trucks to get the jobs reassigned, straight from your save, in all cases the urgent lab does not get build when expected.
Yeah, you broke the game ...

Thank you for testing. I suspect there's some old code where developers assumed the highest priority to be 1 instead of 0 (HI).