Issue description
This train buffer looks almost perfectly symmetrical, but one lane is both favored for the first train, and is also the least favored for continuing. So a train often stands there and triggers the "didn't move for 15 minutes" warning, while other trains to the same station are driving past it.
I'll admit it's not perfectly symmetrical - one lane has somewhat straighter shot. But I think the expectation is rather that when trains are queueing like this for the same no-stop zone, they would be ordered the same way they arrived, ie FIFO.

Reproduction steps
Every buffer that I have, shaped like this, have the same issue.
Game version and build number
0.73 b436
Operating system
Windows