Vocabulary Editor sometimes loses customizations that I know I've added. For example, I've deleted some names that sounds similar to names I commonly use and don't want the possibility of Dragon using the incorrect names, but then at some point later, the names I deleted have returned. And, sometimes the reverse happens, I've added a new word (such as "completionism"), it works fine for a while, but it's some point, the word vanishes from Vocabulary Editor and I have to add it again.

I'm not sure when or why it happens, and it took me a while to realize that it was happening, as initially I chalked it up to forgetfulness ("well, looks like I didn't actually add that word that I thought I did"). Has anyone else experienced this or has a solution?