This sweeper doesn't fill generators.
Receptacle full of coal, priority 4
Auto-sweeper powered and everything in range
Coal generator priority 7. Wired. And I've also tried to move the threshold. Each one of those 3 in-range, are set differently : 0%, 50% & 100%, but nothing better.
If wondering, same automation line.
Also note that 6 others coal gen at the left are working.
At the begging I had the same issue with 8 of those 9 (yep, exactly same settings, threshold at 50% & priority 7, all over those, but only one sweeper was only filling only one coal gen).
I've set all threshold to 100%, and it seemed to change. Sweepers have begun to provide the coal. I didn't check that much since, but it looks like it still buggy, seeing my problem today.
Load my save, because it seems random, or depending unkown settings.