After connecting vcc in parallel, even if one of the computers is turned off, the cursor will still jump to the turned-off computer

[zhqsoft]

The design requires parallel connection of VCCs, but it was found that even when only one computer is connected, the cursor still crosses to the other side.
Can it be determined by USB upstream data to lock the cursor on the side with USB upstream data.
For example, the cursor is locked on the first computer that is turned on, and after shutting down one of the computers, the cursor is locked on the remaining computers that are turned on.