We are creating new posts for new members under category "Uncategorized". As soon as the member is approved we replace that category by "destinations" and "[country]".
Since some time we have to use the "Quick edit" feature in the post list because if we do the edit in the "Edit post" feature the changes are not saved, so the wrong category re-appears.
Does this issue occur with default language posts? If so, does it also occur when WPML is deactivated? If so, then it may not be related.
Please try to do that and update me.
Also, from the debug information you supplied I can see that your MySQL version is lower than WPML's minimum requirement of 5.6. I strongly recommend you reach out to your provider and ask him to upgrade this to 5.6+.
You can see all of WPML's minimum requirements here: https://wpml.org/home/minimum-requirements/
I would suggest you continue in this way. Try deactivating all the plugins, and then testing to see that it works.
Then, start activating them again, in groups, until it stops working. That way you can know who is causing this.
Also, I would suggest you try switching to the parent them, to make sure there is no custom code causing this.
I just opened the debug page and this is still to be read there: "ion":"3.6.4","PHPVersion":"7.4.33","MySQLVersion":"5.5.5",""
Moreover I found out that the categories bug really relates to WPML. On our stage site I deactivated all plugins (not only Troubleshooting mode) and the bug appears as soon as I active the WPML Multiligual CMS plugin:
In the posts list I can still see the three categories assigned but when I use the "Edit" feature none of these categories is visible in the post and if I set categories they disappear after updating the post.
Different when I use the "Quick edit" mode: I see the assigned categories, can edit the list and after saving I see the updated categories in the posts list.
Then I use the edit feature again and now I see the categories from the Quick edit activated but again after editing and saving the categories remain unchanged....
The bug happens when only WPML is activated, correct?
I would like to request admin access to your staging site, in order to see if I can solve this issue quickly.
I have set your next reply to be private so you can share credentials there.
Remember that it is always better to create a new admin user for me, then when we are done you can delete it.
After the usual troubleshooting steps, which did not work, I tried changing the translation setting of Posts in WPML -> Settings -> Post Types Translation.
I discovered that when it is set to "Translatable - only show translated items", categories save okay, and when it is set to "use translation if available or fallback to default language" they don't.
I couldn't replicate this locally, so I will need a Duplciator package, and admin credentials for it, in order to pass along to the development team.
Please provide one, your next reply will have a field where you can put it.
