Is this a feature of FlaggedRevs? Is there any way I can disable it? Generally on my wiki if pages aren't edited for a long time it means they don't need to be updated, not that they need to be checked again. I'm not 100% sure things are being marked unchecked but it seems like they are.
Topic on Extension talk:FlaggedRevs
Pages automatically become "unchecked" after some time
It’s certainly not a feature, I don’t face with it on Wikimedia sites (mostly Hungarian Wikipedia). Is your wiki public? If yes, could you cite a specific page which has become unchecked?
It is public, mostly there have been some category pages which I'm pretty sure were checked & later on aren't checked. That said I don't have a page that I'm 100% certain this is happening to so I will reply again if I'm certain.