[0.18.9] In some situations, inserters prefer to take from the far side of a belt

[triffid_hunter]

In some situations, inserters prefer to take from the far side of a belt.

This causes my mines to drain unevenly, and I'd prefer to not lane-balance all the belts as a fix when this behaviour seems like a (minor) bug.

Inserter #3 taking from far side of belt, when near side is compressed

screenshot-20200303-052503.png (6.58 MiB) Viewed 716 times

Blue inserters 1,2,4,5,6 all prefer the near side of the belt, but inserter 3 prefers the far side - meaning the top lane drains faster than the bottom one in this example.

I guess it's because that corner belt does something weird to the inserter trigger logic?

[disentius]

I think that is explained here:
https://wiki.factorio.com/Inserters