Vance's petty feud with Lancer had nothing to do with that.
However, what /did/ happen (Lancer's repeated instances of being smug and completely disrespectful of other members) was "totally over 40 years ago", so I hope that we can keep the past in the past. He had a generous amount of chances to behave properly.
Notice how this all starts happening right when Lancer comes back
I'll be seeing all of you at the disco lounge later this evening!