I love my BB1.2 which is a BB2 CPU in a BB1 cabinet. I have dual screens.
The BV has always done this since I got it. I will accept a ticket maybe once every 60 times you put it in. As in, you can sit there and put the same ticket in and out, then somewhere between attempt # 10 and 50, it will accept the ticket and credit the machine. THEN: then it will accept the next 5 or 6 tickets, if you put them in right after.
It's a JCB or "J" something validator.
it may have taken less tries when I first got it, like 5-10 tries, now it's 10-60.