Why are my images re-compressed?
There are situations when the images that were previously compressed appear as un-optimized and they are processed again by ShortPixel Image Optimizer.
This happens when our logs from the WordPress metadata are missing, and the plugin "believes" that the images aren't compressed.
The possible causes for the missing records are:
- Other plugins altered/deleted our logs from the WordPress metadata. The most common suspects are the thumbnail regeneration plugins, the thumbnail editor plugins and some watermarking plugins. If you have a thumbnail regeneration plugin, we recommend to replace it with reGenerate Thumbnails Advanced, which is well integrated with ShortPixel.
Important: WooCommerce has an integrated thumbnail regeneration tool that works in the background. If you use WooCommerce, it is highly likely that WooCommerce triggered the image re-optimization. For more information, click here.
- The site was moved to another hosting/domain without copying the WordPress metadata (which is in the database).
- The Bulk Delete SP Metadata button located on Media > Bulk ShortPixel was clicked. This action triggers the removal of our records from the WordPress metadata.
- The images were renamed using a destructive method. There are file rename plugins like Phoenix Media Rename that trigger the re-optimization because it makes ShortPixel "believe" they are new images.
- The plugin was deactivated without checking the box Keep the ShortPixel settings on plugin deletion and then it was deleted.