title: R Shiny app shows old data
body: <p>I have shiny app, which is displaying old data (4 days delay!) though on the server data are refreshed (current day).</p>
  
  <p>What is strange the old dataset does not exist on the server - seems only existing in Shiny cache.</p>
  
  <p>On the server I have 1 dataset done by cron on May 18, and 1 dataset done by manual refresh 24 May. However Data in the app are from May 20! In the report I display date of dataset creation time - that's why I know the data does not exist any more.</p>
  
  <p>Is it posible to reset Shiny cache somehow?</p>
  
  <p>I also have simmilar problems for some other reports. What is strange for some reports it happends, for some not ...</p>