Occasionally when placing many busses, there will be phantom connections where many busses are synchronized while disconnected.
It can be solved by connecting an input to the black wire shown. this will cause one of the phantom wires to go black. toggling one of the signals on the input toggles it for all phantom busses.
Connecting the same input to the new black wire and repeating till all are connected seems to fix it. you can delete every bus connection to the input and it works fine, but once you delete the input block itself, the error arises again.
I am using the Linux version ran on a steamdeck for context.