How long does a twitch prime abo streak last?

I completed a twitch prime abo about a month ago. And you always have to renew it. But how much time do you have to renew it without the streak in my case of 6 months expires. So far, I have always had the luck that I had the day it ran out directly re-completed.

Normally this should be done immediately after prime prime has expired. It was always like that.

But at the moment I have problems with the new prime sub. Is still grayed out. Since 3 weeks.