NPE deleting subscription

When trying to delete a filter's subscription on jira.atlassian.com I get:

java.lang.NullPointerException
at com.atlassian.scheduler.OfBizJobStore.removeTrigger(OfBizJobStore.java:299)
at org.quartz.core.QuartzScheduler.unscheduleJob(QuartzScheduler.java:515)
at org.quartz.impl.StdScheduler.unscheduleJob(StdScheduler.java:256)
at com.atlassian.jira.issue.subscription.DefaultSubscriptionManager.deleteSubscription(DefaultSubscriptionManager.java:133)
at com.atlassian.jira.web.action.filter.FilterSubscription.doDelete(FilterSubscription.java:129)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:324)