Receipt missing tick box and justification field is not working

When submitting expenses we did have it set up so that the user either had to submit a receipt or tick the receipt missing tick box and then provide a justification, but that is no longer working and users are able to submit expense reports without attaching a receipt or ticking the box.

I have been advised that this was working but isn't any longer, could someone please advise, was there something in a quarterly update that has impacted on this?

Currently using 24c