Forum Discussion
Updates to PDF not reflected on "Show on Card" Preview
After updating a PDF on my SP site that is linked to a Planner Card, and marked "Show on Card", the changes to the documents are not reflected in the show on card preview. I am encountering this...
This seems to be a caching problem. I get updated previews as long as I use the browser's incognito mode or if I completely clear the cache. In Chrome you have to open the DevTools (F12) and then right-click on the regular refresh button next to the address bar and select the last option to clear the cache and do a full reload.
See also this idea and vote on it: https://planner.uservoice.com/forums/330525-microsoft-planner-feedback-forum/suggestions/31184449-update-image-thumbnails-when-file-is-modified