At release you had to press F to enable the updrafts. At the first patch this was removed so they would automatically trigger when you would jump on them.
However, with this patch a new bug had been introduced. The updrafts do now not work long enough. You do see the updraft animation for the full length and are also unable to activate it again when it’s in the bugged phase. But they do not work.
Maybe this is a little vague so I will try to explain it a little better.
You activate the updraft. It will now show the updraft animation for 50 seconds.
However flying into it will only make you updraft the first 30 sec.
The last 20 sec you still see the animation but it will not make you updraft. Jumping on the pad again does not activate it again. You will have to wait the last 20 second until the animation ends before you can activate the updraft again.
BTW, it would be nice if we also had an option to turn updrafts on and off permanently.