Close page and search datagrid

Hello, I encounter a strange behaviour in the close page action.  When I am doing a filtering of the data inside a datagrid (using the search button), then going to another page and close all pages, I am going back to the first one with the search / filter still applied, which is what I want.  But sometimes that search / filter disappear. It seems to happen randomly.  Does someone knows why? Thanks
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