How to stop Facebook mobile in-app browser cache on WordPress

we needed to create briefed posts and publish, then in a few hours we update the post content. post content gets updates on web and the end user can see the updated content. but if a user opens up the post in facebook via its in-app browser, then come back later to see the updated content, they will see the same post as before.

if another user first checks the post after it has been updated, they will see the updated content. but wont see the updated post if they are rechecking it after opening it before updating.

this sounds like caching. if it is from the server side, the browser would have not shown the updated content. how do we stop facebook from caching posts in its in-app browser?