Grafana alerts random evaluation time

Hello, I have set up alerts on my dashboard to execute every 24h, but alert executes not every 24h, but in random periods of time. Every 5h, after 24h passed, and etc. , I am not able to find any regularity. Pin screenshot to my setup on alert panel and last state history. You can see missed days and evaluation after 24h passed.

My goal is to set alert for task, which executes and send metrics every 24h. I know approximate task finish time and want alert to execute every day at this time.

Also I have tried to set 1d in “Evaluate every” field, but nothing had changed.