Sorry, yes, I changed a default setting in the last update. The bar used to always pop up in the "stand-alone" viewer (when you Open Image in New Tab). Now it only pops up automatically for WebP and AVIF images. But you can change it back in the Settings/Options.

Under "Button Bar Options" in the "Auto-close and Auto-open" section, there is a checkbox for "image/webp and image/avif only" -- uncheck that box to make sure the bar opens for all images if you might want to save a JPEG or PNG in a different format.