I don’t remember there being any noticeable tension between Chris Harrison and Charlie O’Connell during that specific season, but again, it’s been over a decade.
Charlie O’Connell was a part of The Bachelor way back in Season 7, which aired over a decade ago on ABC.
Besides, what is important is that Harrison remembers that season as not being his favorite ever, and for a specific reason.
He also told Kelly Ripa that there are some contestants he just melds with better than others, and it seems as if Season 7 was just one of those times.