Bengtsson broke off in high-profile forms with long-term coach Peter Widén in early June.
Then she got help from the Russian Svetlana Romanova, who trains world jumper Anzhelika Sidorova, at the Diamond League gala in Florence.
Then it was clear that she would get help from rival Michaela Meijer's coach, Gustaf Hultgren for the rest of the season.
However, Hultgren was involved in a serious traffic accident at the end of June and came back to the athletics arenas sensationally quickly and was on site at the Diamond League galas in Oslo and Stockholm on 1 and 4 July, with several fractures.
Now Greg Duplantis, the fourth coach who has been involved in Bengtsson's pole vaulting for the past two months, will coach Bengtsson in the Olympics.
Greg's main job is otherwise to guide his son Armand in the men's competition.
There he is one of the coaching staff.
His wife Helena is the other.