Bad behavior on balancers with strict input ratio

Issue description

1. Balancers with Strict Input Ratio will always pass through first item without pulling items from other belts. Only after the initial throughput will the balancer enforce strict input.
2. Any modification done to belts (away from the balancer, not near it) causes the balancer to omit items from that belt which ruins the mixed and ignores strict input rules.

Reproduction steps

1. Load attached save
2. Find a mixed belt balancer with strict input on
3. Repeat steps mentioned in description

Game version and build number

v0.5.4g

Operating system

Windows

Attachments

On our shared drive Yandersen - Balancer Strict Input behavior.save

A similar issues, this severely damaged my sushi belts, causing me to frequently manually clean the machine and conveyor belts. And I noticed that other balancers in the same game that implemented strict inputs ratio did not have the problem.

@Captain Zuff

save_24-02-11_01-26-25.save

Added: I've tried introducing the sushi belts design in different games, it doesn't work in the Dyson Sphere Project, it works fine in Factorio(Especially uranium 238/235 pipelines).