Notes disappear and reappear

I have been having a Zotero issue for a week or so now. I will be working on a note attached to a Zotero record, and the note will disappear from the note pane. It typically reappears after several seconds. Anything I typed during the period it disappears ends up at the very beginning of the note. Is this a known issue? Is there a fix?

I'm not getting any error codes, just a repeat of the same issue. I have closed and relaunched, and made sure I have the latest build (Standalone for Mac, 5.0.25)
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