worn ridge
Sometimes parts of the factory will no longer keep belts fully saturated (very close but not quite). As far as I can tell this is when they are far enough away and you are not watching them. It also seems to only affect the painter building (that I have access to so far) . Simply placing the camera over the offending area will fix it for a bit. But it will return. Not a massive bug but it does make looking at certian areas of my factory a lot less enjoyable.
First screenshot is a "offending" area after just putting my camera over it. Second screenshot is having left my camera there for ~20 seconds
eternal dagger