I share this by my experience lose featured image
Let We start ! different kind of problem :
1. Problem : Featured image not show up on usually at post or page !
When you write a content then you didn't see the the place of featured image well normaly on the right below of the back office on post or page editing ! this is you need to do to solve your problem !
- Open dashboard !
- Go to ... new post or new page !
- Then click hidden on the top of the right corner " Screen Option " !
- See the sign disable or able of your featured image !
- Your problem will Done !
2. Problem : Featured Image not show after you insert all of picture on column featured image but when you open the post not show up normally this is what you need to check !
- Open your dashboard !
- Go to your theme Customize !
- Look after Main Body = Thumbnails Setting = And give able / Check = Thumbnails place holder Save and Done . You will up and running again !
Hope your problem can be done with my tip fix the problem of futured images on word press !