WordPress Posts Removing Data Automatically

I have a movie site . In Every posts we add screenshots and Download links but its removing from some of posts like if we create 10 or 20 posts and draft Or Publish them after 1 hour or 2 hour some posts remove screenshots and download links completey automatically. Remember We don't need any plugin for that just fix code of theme.
Key Poin
1: Some of posts effecting with this not all after draft or publish
2: Removing completey screenshots and download links
3: I don't need any plugin for this Just fix theme code
4: This theme is not nulled
5: Drama and Episode both have donwload links and with same code
6: Its remove data only from screenshot and download links metabox
video link for more detail:
https://youtu.be/Zax-NKa9wIM