The brewery visible at load is connected to its nearest pub through a boat line and two road lines. It is being supplied with all it needs, yet it doesn't start releasing goods.
sve: https://www.dropbox.com/s/5tfncki0sriqh0q/Brewery%20not%20producing.sve?dl=0
I cannot reproduce this, I am afraid; on loading, there are 8 barrels of beer in the stop destined for Glaschu Pub Stop.
Same here. That means you would need to try and reproduce it "manually".
Can you elaborate on the necessary steps to do so reliably?
I don't know for sure, but I think it may have something to do with supply. If I recall well, the brewery was already oversupplied before when I connected it to the pub.
It will be exceedingly difficult for me to do anything about this without a description of how this can be reproduced reliably, I am afraid.
First connect an industry to its suppliers and wait until its storages are full, then connect it to its consumer(s).