Pathfinding and stone processor 0.50.3

[Jerrywalker]

Sorry if it's already was posted but i can't find such bugs on forum.

Just started my new town from scratch and after playing pair of hours pathfinding became corrupted in strange way - i have stone mine and processor close by (processor oriented with working point towards mine) When i assign someone to automatic work on processor and it runs out of raw mats operator instead of going straight to mine to get some rocks walks around processor to it's opposite side and stuck there trying to get back. (i see how he moves a few steps to corner of structure and goes back after it). When doing so it's order is set to "operating machine". Walking him out manually doesn't fix that because he repeat it again. ctrl+shift+F11 doesn't fix it - same as saving and reloading game.
The only solution that i've found is to manually move rocks from mine to processor so operator doesn't need to leave machine or don't assign anyone to automatic work on processor.