It Stopped Working for WP Thumbnails

Hi

Post Thumbnail Editor stopped working for a couple of my sites, I found a solution that caused it to start working again, but wanted to let you know as it seems like a bug.

Symptoms:

• The editor appeared to still work. I could crop images and it would save them.
• However the thumbnail in the media library didn’t change.
• If I went back into PTE and clicked “thumbnail” the updated thumbnail was there. Even though it wasn’t showing in the media library.
• If I went into WordPress’ native editing functionality, the thumbnail it displayed was the original thumbnail.
• I went to a post and inserted an image and selected “thumbnail” size to be inserted. It inserted the OLD thumbnail, not the new one.
• However the images were correctly updated for any additional image sizes that had been specified with the add_image_size() function. Where one of these images was pulled into a template, the updated cropped image was shown. So the problems only seemed to be with the iamges sizes built into the core of WP.

I tested this on two different sites with two different themes:
* Canvas from Woothemes
* Genesis child theme

Neither worked. BUT then in an attempt to get data on what was happening, I turned on debug mode. I cropped an image and it worked perfectly. I turned off debug mode, and it kept working fine.

So on my second site I simply turned on debug mode, saved changes, then turned off debug mode and saved changes. Then I went to crop and image and it worked! The media library now showed the the updated thumbnail. And inserting an image into a post as “thumbnail” size now gave that updated version.

For both of these sites I had updated to the most recent release of Post Thumbnail Editor. I suspect that in the upgrade something might have stopped working, and turning debug on and off somehow caused it to started working again? Is that possible?

I hope this helps others, and hopefully helps you find what went wrong, if this is being experienced by others too.

https://wordpress.org/plugins/post-thumbnail-editor/