I've opened a case on this but still no resolution to our problem.
We have some advanced alerts that are not getting triggered any longer. This started after updating to 10.1.1.
If I use the TEST ALERT feture it will always work with the action but the real-thing won't work.
Also with using the TEST ALERT, I know the node to be DOWN, but it will see it as being UP. As if the node status didn't get updated in the database table.