"A recent rumor suggested that Charlotte recently asked for time off from the company and that this is why the title changed hands on July 25th’s show. If true, this would have explained why Sasha won on an episode of Raw rather than at SummerSlam; the two superstars have a match scheduled for that pay-per-view, so saving the victory for August would have made sense.
However, new information is beginning to emerge that conflicts with the idea of Charlotte asking for time off. PWInsider is now reporting that Charlotte has no plans to take any time off, and in fact she is scheduled for many future shows. Instead, PWInsider says that Vince McMahon felt that Charlotte’s time as champion helped to legitimize the WWE Women’s Championship title, and now he finally felt comfortable handing it off to someone else."
source
However, new information is beginning to emerge that conflicts with the idea of Charlotte asking for time off. PWInsider is now reporting that Charlotte has no plans to take any time off, and in fact she is scheduled for many future shows. Instead, PWInsider says that Vince McMahon felt that Charlotte’s time as champion helped to legitimize the WWE Women’s Championship title, and now he finally felt comfortable handing it off to someone else."
source