Factorio Forums

so bottom: splitter throwing on top
top underground belt entry going from right to left, and single (no second output), and reverse


with an exit plus normal orientation: (no reverse), graphic glitch: no openingn but work as expected:

first is right lane not working, second is working.

setup used to work in 0.16

horizontal mirroring the setup doesn't show the bug in the mirrored version (working as intended)

Can you post the save, please?

splitter position is 81,-100! edit save only work on 0.17 however so take care!
1-
seems inconsistent, after reload graphics fixed, and worked again after double reverse (R) of U - BELT, but stay stuck as long as I don't do this action

Server was on Redmew

2-
emptying (f) near the underground belt/splitter unjam it: appear to be some object clog

3-
yes : i saw a copper and circuit overlapped!

4-

Deleting a belt after the balancer unjam the Ubelt, rotating don't

edit weirder:

rotating belt so that portion of belt are disconnected from the main loop (no more interraction) don't unjam, then deleting those now unrelated belt unjam it

sorry upload failed hence the time

i've put together some test/ finding

i can't make the original graphic glitch work however as during the server session

Thanks for the report and for uploading the save.
The problem was that it was possible to build two underground belts on top of each other under some circumstances (you can see that on the screenshot due to very dark shadow) and that broke things.
The bug was fixed and if I load the save in 0.17.23, it works as expected.

great, glad that i could help!