views and alerts
What version of envision are you running? Envision re-syncs alerts after the configured date and time marker or number of alert events are reached.
One question I have is how many alerts are being generated in the timeframe your talking about? As I recall the alerts are re-synced after the alerts reach 10K rows in 3.7.
I would look at what alerts are being generated and see if there is some problem somewhere. I have seen where the alerts view resets every couple of min when I had a problem with an Envision service or a runaway process on a device that I was alerting on and it generated 10K alerts in a short amount of time.
More information can be found in the Set Up alerter service