Today I have encountered the 5000 limit error even though my view is filtered on an indexed column. I believed that because the filtered view was on an indexed column then the result could return more than 5000 items?
So even if columns are indexed and used in a filtered view then it can only return a maximum of 5000 items?
This also affected other views that use the indexed column to filter and do not return anywhere near 5000 items. These views do sort on columns that are not indexed, would this have an impact?