Exception in alarm clock event subscriber

We are on Sitecore 9.2 with SXA 1.9 hosted on Azure PaSS using XP0 topology. We are noticing numerous exceptions in the logs files about Alarm Clock Event Subscriber

Sitecore Loads Slow after Login

We are on Sitecore 9.2 using Azure Ad integration and hosted on Azure PaaS. . Eventually we started experiencing extreme slowness post login.