Is this a glitch?

In infinity war when Thanos had activated all the stones he had and was aiming at Tony, Dr strange intervened and gave the time stone to Thanos.

But people who are creating theories for doomsday saying are saying that dr strange saw only one future where Tony also dies and Thanos also dies. But in this case if Thanos would have killed Tony dr strange can use time stone to convert Thanos into baby Thanos and everything would be fine???