OK, I did that but with the same results.
After re-publishing CB Conditional:
I set all of the five Query Drop Down fields in the Field Group to have no conditions attached. I manually cleared any legacy values to be certain and checked them again after saving each field (see attached images 1-3). CB Conditional for all five fields are set to Normal CB Settings.
Image 4 shows the input for the five fields, where values are entered for all five of them.
Then I clicked Save.
Image 5 shows what is displayed after the database has been updated. The first two fields have been saved as expected, the last three have been set to NULL instead of being updated with the selected values.
To confirm, I checked the Group Field value in comprofiler and it contains:
[{"cb_make_extra":"Vauxhall","cb_model_extra":"Lotus Carlton","
cb_series_extra":
"","
cb_version_extra":
"","
cb_body_extra":
""}]
It should contain:
[{"cb_make_extra":"Vauxhall","cb_model_extra":"Lotus Carlton","cb_series_extra":"-","cb_version_extra":"-","cb_body_extra":"Saloon"}]