Press play on one deck,another deck play together

Hello, I have been experiencing this issue several times recently. When I connect my 4 CDJ3000s and DJM-A9 using a Hub via Pro DJ Link, when I play a track on Deck 2, Deck 1 also plays at the same time.

At the time, the VJ's ShowControl was also connected to my hub. Additionally, both the CDJ3000 and DJM-A9 were running the latest firmware version, and this issue also occurred in the previous firmware version.