I'm seeing this trend a lot lately, and I'm hoping they are just isolated incidents and not changing the culture of ultimate.
Offensive player (new to the game) catches the disc near the end zone just before the goal line, defender clearly calls "not in" as they had the best perspective. Player who caught the disc attempts pass to teammate, disc hits the turf. Offensive player (experienced player) from halfway down the field tells teammate that they were in (had no perspective to make such call), and says "just contest anyways it so we get the disc back". The offensive team did not want to resolve the call by sorting out what actually happened, just to "contest it" to avoid a turnover.
Really? Just contest it anyways?
In a self-refereed sport, the foul/contest system is crucial to ensure the integrity of the game, but for an experienced player to command a newer player on their team to "contest" for the sake of getting the disc back seems horribly wrong. I hope this isn't a common occurrence (I'm a 13 year veteran of the VUL), but I've only started seeing this lately.