Still finding CBS a bit odd. They have been spoiling the FF episodes for a few season's now...but giving us WHO takes it? odd...
Of course, it isn't clear if their attempt is successful...or not!!
However, it might be instructive to check out what percentage of completed Fast Forwards have gone unchallenged. The only easy way I know to do this is a historical analysis for the entirety of Amazing Race seasons to develop the data from scratch for seasons 15 to 21 but use as a database for seasons 1 to 14 a favorite Amazing Race reference book "Circumnavigating the Globe: Amazing Race 10 - 14 and Amazing Race Asia 1 - 3" pp. 261-265:
CHALLENGED COMPLETED FAST FORWARDS
AR1 ep. 1 - Rob/Brennan beat Dave/Margheretta to Boiling Pot
AR1 ep. 9 - Joe/Bill vs. Nancy/Emily at Buddhist monastery
AR2 ep. 2 - Shola/Doyin beat Gary/Dave and Peggy/Claire withdrew on beach volleyball vs. Brazilian team Copacabana Beach
AR2 ep. 7 - Gary/Dave beat Mary/Peach to fortune teller in Hong Kong
AR2 ep. 9 - Chris/Alex beat Blake/Paige at eating meat pie at Harry de Wheel's
AR10 ep. 10 - Blake/Paige beat Wil/Tara in Queenstown Shotover River Jet Boat ride
AR3 ep. 1 - Ken/Gerard beat Derek/Drew in search for Mexico City street typist
AR3 ep. 6 - Ian/Teri beat John Vito/Jill and Flo/Zach dropped out in Marrakesh search for Oriental rug with logo
AR4 ep. 9 - Chip/Reichen beat Jon/Kelly to Sepilok Orangutan Rehab Sanctuary
AR7 ep. 5 - Ray/Deena beat Rob/Amber to Soweto Orlando Cooling tower rope bridge walk
AR8 ep. 5 - Paolo family beat Gaghan family to Panama City Power Station Tandem Bungee Jump
AR9 ep. 6 - Eric/Jeremy beat Monica/Joseph in Stamatopolous Tavern plate breaking
AR9 ep. 12 - BJ/Tyler beat Ray/Yolanda in Lopburi cricket eating contest
AR13 ep. 8 - Nick/Starr beat Terence/Sarah in eating a Kazakh specialty with sheep's butt in Almaty
AR17 ep. 5 - Nat/Kat beat I believe Nick/Vicki (not quite sure) to cabin with eating boiled sheep's head in Narvik
AR20 ep. 6 - Rachel/Dave beat Danny/Joey at Stack Hay on truck outside Baku
Total - 16
UNCHALLENGED COMPLETED FAST FORWARDS
AR1 ep. 2 - Pat/Brenda white water rafting on Zambezi River
AR1 ep. 3 - Kevin/Drew find Mariage Freres Tea Shop in Paris
AR1 ep. 7 - Frank/Margarita search Estense Castle moat in Ferara
AR2 ep. 4 - Oswald/Danny - search Swapkopmund Hotel moat for flag in Windhoek
AR2 ep. 11 - Wil/Tara - Mt. Tarawera scree run
AR3 ep. 2 - Derek/Drew fly with voladores at National Museum of Anthropolgy in Mexico City
AR3 ep. 3 - Andrew/Dennis operate a tank at Duxford Imperial War Museum in Cambridge
AR3 ep. 7 - Flo/Zach got the attention of a surfer in the Inn River at Innsbruck
AR3 ep. 9 - John Vito/Jill eat cheese cubes to uncover clue in Kanderstag
AR4 ep. 1 - Monica/Sheree did showshoeing up hill in Alps above Cortina
AR4 ep. 2 - Steve/Dave performed street theater with Commedia del Arte in Venice
AR4 ep. 3 - Steve/Josh waltzed trays of champagne at Schonbrunn Palace in Vienna
AR4 ep. 4 - Tian/Jaree assemble a puzzle at Musee des Patisseries near Marseille
AR4 ep. 6 - Millie/Chuck ride on windmill vane at Molen van Sloten Windmill, Holland
AR4 ep. 11 - Dave/Jeff safe water rescue on Sunshine Coast of Australia
AR5 ep. 5 - Colin/Christie move a sarcophagus at Pharaonic temple near Cairo
AR6 ep. 7 - Bolo/Lori drink a goblet of pig's blood at Budavari Larinitus cave in Budapest
AR6 ep. 8 - Adam/Rebecca walk on ocean floor in antique diving suit at Ajaccio
AR7 ep. 9 - Uchenna/Joyce head shaving at Hindu temple in Jodhpur
AR10 ep. 6 - David/Mary with assistance from Erwin/Godwin put out oilwell fire in Kuwait City
AR10 ep. 8 - intersected Rob/Kimberly and Tyler/James ate cows' lips in Antananarivo
AR11 ep. 8 - intersected Danny/Oswald and Uchenna/Joyce count steps for Town Hall and St. Mary's Basilica in Krakow
AR11 ep. 10 - Oswald/Danny in high speed stunt sequence at Hong Kong Kai Tak airport
AR12 ep. 7 - get a tattoo at Fabio's studio in Empoli
AR13 ep. 4 - climb mast of Sky Tower to retrieve gnome in Auckland
AR15 ep. 5 - Cheyne/Meghan to the Autodrome for taking a McLaren F3 racing car for one lap in 45 seconds or less, Dubai
AR16 ep. 7 - Dan/Jordan to the Singapore Flyer ferris wheel to go from observation pod on top out and cross to adjacent one
AR20 ep. 4 - Art/JJ piloted a toy helicopter in Lingoto building in Turin
AR20 ep. 10 - Mark/Bopper got their heads shaved at Chartala Buddhist temple
AR21 ep. 4 - James/Abba collect and deliver rats
AR21 ep. 9 - Natalie/Nadiya were first to Flying Dutchman amphibious and eat 5 herring each during its route in Amsterdam (note my non-consideration of Jaymes/James contesting it is because they arrived at the start point as Natalie/Nadiya finished)
Total - 30
My conclusion is that 35% of all historical FAST FORWARDs have been contested and 65% uncontested. Which one will AR22 ep. 7 be? Available history cannot answer that yet.