Yes, my friend and I were using two different computers, he opened a server and I connect to his game via the internet to play the multiplayer game.

I was not sure what triggered the bug though, that time my character was keep moving west. I could press the D key to change it to east, but it would ...

Under some very rare unknown occasion, the player will keep moving into one direction even the w/s/a/d keys were not being pressed.

There were two occasions which this problem has been fixed:
1. Joining friend's server, for unknown reason my character keep walking to the west side, relogin didn't ...

There are a few updates to the points mentioned above:

1. Probably the intermediates of a handcraft product will not be counted towards other players' achievement counter, unless the players handcraft something or reload the game.

2. The problem was found to be due to another player mistakenly ...

Currently there are two spotted problems of this achievement in multiplayer game:

1. By checking the tracking window of the achievement at upper left part of the screen, it is found that the no. of handcrafted item for different players would be different "temporarily", and the number will slowly ...

The problem is not related to transport belt at all, as the burner inserter is grabbing coal from ground.

Since the problem only happen very occasionally, I will check if it happens again after the update and upload the save if possible.

The following setup was made at steam engine site:

Coal belt -> burner inserter -> boiler -> burner inserter -> empty ground -> burner inserter -> boiler

The setup is made for transporting coal across lanes of boilers with just 1 input coal belt.

It is found that when the energy source is changed ...

Sometimes the burner inserter used for inserting coal into boiler would ran out of fuel, even coal is available at the back of the inserter. The inserter simply stopped working.
Manually picking up the inserter and re-placing it back to the position would make it works again.