In my testing to further replicate I learned of another critical item needed to reproduce the bug which is concrete. Rails at certain(?) angles/curves seem to have trouble going between un-concreted tiles and concreted tiles.
Discord image of the reproducing: https://cdn.discordapp.com/attachments/1071634648368676904/1381311265556660385/image.png?ex=68470ddd&is=6845bc5d&hm=5403c122094bf6a8567eebefd07b9328a08b0347c16901916c1b55292d53247e&
I laid down my train blueprint on the left-side of the rail before I put down the concrete and it installed fine. Then I added some concrete strips and put the blueprint down again and got it to fail.
Here are some blueprints just for ease as it for sure contains angles that break:
1x1 Tile Blueprint:
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I/O blueprint:
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