As title says:
Issue:
1. When pressing Go button, which should fetch all data, the preview app only query 20 records
$skip=0&$top=20&<br>

Scrolling down doesn't fetch the next 20 records. I'm handling the top & skip from my custom RAP class:
SELECT (lv_select_string) FROM /dmo/customer WHERE (dyn_clause) ORDER BY (lv_orderby_string) INTO CORRESPONDING FIELDS OF TABLE @lt_result UP TO @lv_top ROWS OFFSET @lv_skip.
Not sure of it's a limitation of the Preview Fiori, or there is a way to force it to use auto growing in List Report.