I have added a custom image upload option in custom CPT page and here is the screenshot –

The image is showing well in side bar of admin page after updating a post, screenshot-

But when I add that same meta box in bottom, the image is not being shown or printed there, screenshot –

Although meta key and meta value is being updated in database, screenshot –

But when I remove other metabox in my CPT, the image is being shown or printed in bottom of admin page. The issue is strange. Here is the PHP and JS codes of image uploader – https://docs.google.com/document/d/1ONfjTOysL_wYr_bkjqWlBkLDprDv_k889BbIRgiw67k/edit