I enabled image locking feature and it wasn’t unlocking images when someone of that pledge level logged in. So I unchecked the feature and went to settings >permalinks and Saved again. Still not unlocking images. I tried deleting image and re-applying a new upload of the same image and it is locked too. This is on several images in the post but not on all images. The post does have 44 images.
This may be due to image-caching on the side of WP or the server. Or your browser.
Try ctrl+f5 after logging into the page via Patreon to see if the images will be unlocked. If they do, then its just due to caching.
Also, please make sure that you dont have ‘cache pages for logged in users’ or a similar option turned on in your caching plugin, if you have one.