Spent yesterday testing out waking the car up. It takes a while to connect and would always time out.
If I click into controls and then back out while it's trying to connect then it takes a while but connects. If I don't it times out.
This may just be coincidence but I was able to wake my car several times yesterday using this method.
Hopefully they sort it out soon.
I've been seeing that behaviour too. Despite not connecting it sometimes gives you a live unlock icon in Controls or on the first screen and if I click that it shows as unlocked, then shortly after that the full app connectivity returns.