Nexus OSS 2.3.1 - Scheduled Tasks randomly disappearing from Nexus UI

With the latest Nexus OSS version 2.3.1, we had scheduled a bunch of Scheduled Tasks but suddenly some of these tasks disappeared from our Nexus UI. I restarted Nexus and it appeared back but again a day later, some of them randomly disappeared from the Nexus UI (Note that they are still present in the nexus.xml config file). First I assumed that this was only a UI display problem but later realized that the scheduled tasks which disappeared from the UI did not run as scheduled either.

Please let us know how this can be resolved.