It should open an edit form with old values.
Not showing the edit form with values.
PHP version: 7.1.12
phpMyAdmin version: 4.7.7
Browser: Google chrome
Operating system: Windows 10/64
We had the same bug.
To correct it, change the max_input_vars php ini parameter to something very big (1000 is the default and it is too small).
We set 5000
You may have to change max_post_size or other parameter.
Related to #13887
Should be fixed by #14036.
Most helpful comment
We had the same bug.
To correct it, change the max_input_vars php ini parameter to something very big (1000 is the default and it is too small).
We set 5000
You may have to change max_post_size or other parameter.