Overriding image does not change the dimensions
When using the build in file upload functionality and overriding an image, the image gets uploaded, but the width and height in sys_file does not get set properly which leads to that the Frontend uses the old dimensions... :-(
Updated by Stefan Neufeind almost 8 years ago
Could it be you're experiencing problems with different storages being used? We once had a case where the image was updated by upload through the filelist (using auto-created storage 1). But the page-template was using the image via regular paths without specifying a FAL-storage (and thus using the legacy-storage 0). In our case the dimensions were updated correctly in storage 1. This was part of what the patch for "always finding the best-matching storage" (#45498) was planned to address.
Please have a look in the database for your file and what storages/dimensions are listed there.