Us Weekly reports Harrison left the La Quinta Resort & Club in La Quinta, California, where The Bachelorette is currently filming, to drop off his son at Texas Christian University. “The moment he got back, Chris was told he could not set foot back on the set until he went through another 14-day quarantine,” a source tells Us Weekly. “The show’s contestants and crew all had to quarantine on the property for 14 days prior to the camera’s rolling. But it didn’t dawn on Chris he’d have to do it all over again if he simply left to take his kid to college.” So Season 12 Bachelorette JoJo Fletcher will fill in as host, according to Us. This will mark the first time in nearly 19 years that Harrison hasn't hosted a Bachelor franchise show. ALSO: Colton Underwood slams The Bachelor producers and Chris Harrison for taking advantage of Cassie Randolph on The Bachelor: The Greatest Seasons -- Ever!