Plugable USB 2.0 Switch reliability

I have a Plugable USB 2.0 Switch that simply connects my wireless keyboard/mouse to my two computers. It worked great for a couple of months - then became unreliable. Sometimes it would connect to one computer, but not the other. Another time the computers were reversed. Then I found that one of the two output cable connections worked and the other did not. (I tested this by changing the cables to the “hot” port. Any ideas on what is going on? (By the way I’m pretty experienced in computers.)

Kiefer (Toby) Tobin