This never actually happens.

Since Hubble launched there's been a near complete consensus on the bounds that were radically reduced down from before. Perhaps you were born in the seventies or earlier? Well before CMB studies and the Hubble telescope launched.

There's just been a ton of science trying to reconcile the difference in the upper and lower bounds that are far closer than they were before. But it's a few billion years, not doubling or halving.