alpha skip ahead gone.....reinstated by team insider member.

You must be invited to become an Alpha Insider or Alpha Skip Ahead Insider, to do so You must Very active in Xbox, doing missions and report the bugs You see in the system, as much as You do this, so You Will be Very close to become an Alpha Insider. You
must be at least in Delta preview to become an Alpha Insider, but You Just need to be an Insider to be invited to become an Alpha Skip Ahead, but this one is very rare to be invited and there is a certain number of people to be invited, no more than that,
If You were not invited to be Alpha Skip Ahead certain time, so You must wait a Second chance when they Will invite New members.

We're testing it in the Insider program at the moment (alpha/alpha skip ahead members) so if all goes well then it wont be that long before it's made public.

Only Xbox Insider Hub members ( Alpha Skip Ahead - Alpha - Beta ) ring, can subscribe to the XGPU. I believe it will be open for everyone to subscribe later this year.

Fill out a detailed report, giving make and model of headset you use and send it to the development team.

I am in Alpha Skip ahead and sometimes get these issues. You could try backing out of the Insider program, to a public build and seeing if things work.

Remember Alpha and Alpha Skip Ahead are the cutting edge OS builds and can be full of bugs.

You need to either be in the uk or us and be an xbox insider on ring beta, alpha or alpha skip ahead.