Shared schedules getting set to expired

SQL 2019 , SSRS 15.0.1102.675 native mode.

Does anyone have a solution to this problem? It started about 3 weeks ago after the server was rebooted. The SQL instance came up but the Agent timed out and was down for a few days before anyone noticed. I restarted the agent but since then any time a report or subscription runs from any shared schedule, it runs one time and then the schedule gets set to "expired" even though there is no stop date for the schedule.