I tried following your advice but after two frontend edit, here is what my field looks like : {"0":"{\"0\":\"{}\"}"}

I then tried also removing the read-only and that way it seems to be working but that means I am forced to allow user to choose params if I want the website to work correctly.

So even if it fixes the issue, it seems to me it's not a normal behaviour or if it is there should not be a switch to allow or disallow user params in CB settings and the field display options should not be editable in fields parameters.

Well, anyway, I did hide those fields via CSS instead of field settings and this way it fixes the issue for me in a manner that suits my needs.

Thanks for your help.

Sorry for the late answer.

I tried hiding the params this way but it does not work either. Here is the new value of the field after two frontend edit with this configuration :

{"language":"","editor":"","timezone":"Europe\/Zurich","0":"{\"language\":\"\",\"editor\":\"\",\"timezone\":\"Europe\\\/Zurich\",\"0\":\"{\\\"language\\\":\\\"\\\",\\\"editor\\\":\\\"\\\",\\\"timezone\\\":\\\"Europe\\\\\\\/Zurich\\\"}\"}"}

And I had to reset the filed for this user after changing back the CB parameters in order to get it right again.

It seems the only way the field is correctly set is really when having the params fully accessible and thus the only way to hide them (at least actually) is via CSS.

If I can help with some more tests, just tell me.

Guys I am haivng this same problem suddenly after adding two CB Query fields - when the user presses Update they just get a blank screen and debug message is

Fatal error: Allowed memory size of 536870912 bytes exhausted (tried to allocate 58721240 bytes) in /home/membersweb/public_html/libraries/joomla/database/driver.php on line 2039

Has a fix been released yet?

Thanks

Cliff

FYI I ran the fix suggested in another post, i.e. UPDATE `XXXX_users` SET `params` = '{}' and it fixed the memory issue. So for now am ok