Flashcards reading 4 of 20 in reviews

Hello,
I set up a page named ‘Flashcards name spaced repetition’, which is a nice dashboard for different pages with preferred groups of words I would like to practise.

Strangely the review is only picking up 4 of 20 words from the Flashcards?
I have created 3 pages of 3 differently grouped words and only 1 of the pages has this challenge. 0/4 should really be 0/20, as per screenshot.

My error. I forgot to add #card after the word.