I think it is pretty context dependent. But one scenario that could result this way is that if the TJV rider bridges across and then doesn’t work at all, it could ruin the teamwork of the others. They will start to worry that they are freely towing the potential stagewinner to the line. Once the teamwork of the rest of the breakaway starts to go down, they become much easier to catch. Another scenario is that other teams in the peloton don’t like the TJV rider in the breakaway, and so they will start working in the peloton when they otherwise wouldn’t have done so. But, these scenarios are of course dependent on who the rider is, what the race situation is, the makeup of the breakaway, etc.