I just assumed that cobalt ore in the world wasn't "required for normal operation" of the mod pack since the other recipes exist. Then I enabled cobalt ore on my next world because I didn't want to manage getting it through recipe only.

A few people have come across that issue, but the devs have not been able to reproduce it. See for example viewtopic.php?t=61705 viewtopic.php?t=59807 viewtopic.php?t=58984

Cobalt ore needs to be checked in mod settings if you want to get it that way. Dunno if that's intended.

Ooo, if you're reworking rocket fuel, could you make the recipe ... done in a chemical plant? Making rocket fuel in an assembler makes some sense from a gameplay balance perspective, because you need it in equal amounts as low density structure and rocket control units (satellite excluded). Chemica...

The update should be live on both stable and experimental. It apparently did not fix all causes of inserters getting stuck. See for example viewtopic.php?t=61705 viewtopic.php?t=59807 viewtopic.php?t=58984

Are you running stable? Sounds very much like this bug that was fixed in 0.16.37.

Vehicle roboports definitely work when the train's stopped but not at a station. And there's a checkbox to enable the ports while moving IIRC. The robots and materials have to be in the same cargo wagon as the roboport. It doesn't work across the whole train. Also sounds likely that you're running i...

It's the second time it happens today : with rotative inserters, they can't sometimes put the items on the belts(because it's full), but once there is nothing left... they don't release the items, and I have to rotate the belt to make the inserter release the items. That sounds like 59316 , which i...