Not necessarily. Ben and LP have remained friends. I know back in 2008 when YC was on hiatus, the original YC lineup of Warren Cooke, Todd Clarry, Ben Dobson, LP, and Ben Harper all played a show where they played music from their 'Where We Stand" record. There could be bad blood. I don't really know for sure. But I don't think you can assume there is just from them playing a show together.
LP has been moving farther and farther away from this band throughout the years. He usually takes off on his own during a day off or before and after shows so I have always assumed that they weren't getting along the best.