I've noticed some unusual behaviour in WP Smuch Pro at the Media screen. To start with, I thought it might just be this site, but after trying WP Smush Pro on a number of other sites on different servers and with different combinations of plugins, the only common thread I can find is WP Smush Pro.
So, to run through the issue, you are editing a post and want to add an image. Open up the Media dialogue window and either select an image or upload a new one, it doesn't matter which. Edit any of the metadata fields (title, alt, caption, or description). Whenever WP Smush Pro is enabled a couple of things occur here.
1. You can not tab between these fields anymore.
2. A few seconds after manually clicking to the next field since you can't tab, the data you just entered in the previous field disappears. Sometimes I get a few fields done before it disappears, but then sometimes one or more of them disappear at the same time.
3. The saving spinner appears at the top of the media window, once it stops the text entered sometimes reappears and sometimes doesn't. If I had done multiple fields, sometimes all reappear and sometimes only some.
4. If I manage to get all the fields filled in and click insert before they disappear, I find that sometimes they are all saved and sometimes they aren't.
I've done some searching but can't see anything on the same kind of issue. Has anyone else noticed this? Does anyone have any suggestions on how to fix this? I've tried with only the WP Smush Pro plugin enabled and it still happens, so it has to be an issue with the plugin, but I don't know if it's solely the plugin or if it is a compatibility issue somewhere else such as with server software. It is really inconvenient though and results in a lot of time wasted, even just because of the inability to tab between fields.