Sometimes when sideloading to belt, sideloaded belt gets priority over mainstream belt. Hard to reproduce: create gap on mainstream belt, repeat a lot. Sometimes happen when placing to be sideloaded belt, while both belts compressed.

When creating blueprint with trains, after disabling "Entities" in blueprint filters you can no longer remove/restore trains because train entities are no longer selectable (case A). Even if manage to remove some trains by workaround (case B), blueprint doesnt save that changes. Creating b...