Answer key not updating in student answers

Short answer type question, query.

I have typed in multiple answer variations and Formative did not mark my students answers correct. When I went through their responses manually, I added their response to correct key list, but the other student’s answers were not updated with the added correct key answer.
I event selected allow partial match. Still no update in the remaining student answers.

Any ideas?

I find that sometimes I need to refresh the page after I update the key. It’s like it ‘rescores’ assignments when I do this.