TODO List - Entries Disappear

I have created a blank document to assign TODO List items to, I have created about 5 entries, I close out RDM and reopen it, select the document and select TODO List, and the list is empty. If I add a new entry then all the missing ones show up, closing out of RDM and reopening, the entries are all missing again found that using the refresh button in the TODO list will also display the entries, Would like to have it auto refresh when clicking the TODO List menu icon.