Ok, weird, seems to be working now after installing the mod again. Tho i did remove bob inserters, and reinstalled that again after installing and testing this mod, so might be something there.
Sorry, that took way longer than planned. Orininally, i wanted to implement a new task queue based on a ring buffer for each tick modulo N to drastically decrease the UPS impact of the mod. But i never found the time to actually implement it.
The update includes a novel aproach on the out-of-fuel handling of burner inserters though...