Rows Not Expanding in Matrix

Hi, I am experiencing a similar issue with a report that I have been working on (unfortunately, can't share details). The report does make use of a matrix with 4 levels of expansion. The last row of data expands inconsistently amongst the users of the report. One user will be able to expand the row and see the data displayed. While another user will click the [+] button to expand the last row and the only change is that the button is now [-] but there is no data displayed. Only when the second user refreshes the visuals filters/slicers does the data display. Does anybody know the reason for this and if there are any possible solutions?