Steps to reproduce:

1. The problem is in place from the beginning 
2. The "MSSQL: Percentage of work tables available from the work table cache is low" trigger shows the problem once the value is below threshold, but once value is high then threshold, the problem is not resolved automatically and stays active forever. 

Result:
Screenshot (1,2.png)

Expected:
Problems should be resolved once the threshold is met or higher.