As some of you know, we are booked (actually re-booked) and already have tickets for J&E in 2021, but are hoping space opens up on a different departure that year, so we can switch.
Delta's 330 day booking window for the alternate departure opened up two weeks ago, so I have been following fares. When I just checked I discovered the business fare is now DOUBLE what it was last night!! (it is now $7400 per person!! ) 
If it doesn't go back down, we may keep the departure and flights we have- I'm not paying that!!! It could be an error, but I won't know for awhile. The price spread between non-refundable (what we always get) and refundable tickets is less than usual, which makes me think there is a glitch. In these crazy times, who knows?