Mobile Glitch or Website Bug?

On the website, although having exceeded my LingQ limit, I can still mark individual words as known. On the mobile app, however, I cannot mark individual words as known; instead, I’m treated with a message about LingQs. The only way I can mark words as known on the app is by turning on a setting that marks every word on a page as known after swiping past it. Is there a solution or is this a bug on one of the platforms?

Are you using iOS or Android app?