Go to an existing filter e.g. all open issues - let's say there are 20 issues
In the fast filters, filter by Assigned to and see a subset of the results e.g. 8 issues

I now go through these with the person. So I open the first issue.
I want to use the Next feature (top right) to review the subset of 8 issues in turn and add comments.
However, it starts me at a midway position e.g. 5 of 20 rather than 1 of 8.
This seems to be the position of the issue in the all open issues filter and does not take into account the fast filter.
When I click next, I will encounter issues that are not in the fast filter.