The uptime score is a moving window of 30 days. So as long as your day with the downtime is within that window, the uptime score won’t go up.
E.g. if the window would be 3 days and you have a downtime on the last day:
- 100%
- 100%
- 50%
So uptime score would be 83%. Now on the next day it would look like this:
- 100%
- 50%
- 100%
So the average is still 83% as long as that day with 50% is within that window. Only once its outside the window the score will go up again.