Can't carry default comboBox value over into $_POST variable

I still can’t seem to get a default value to pass as a PHP $_POST variable. It won’t carry over unless manually re-entered (typed).

The initial load works great when entering new records. But when attempting to retrieve a record to edit, for example:

It displays OK in the combobox, but never carries over when submitting via POST method.

Can you help? Please?

Unfrtunately the problem can’t be recontstructed locally, if div tag used as container for combobox is inside form - value of combobox must be included in send data.
If problem still occurs for you - please try to use attached version of dhtmlxCombo - this is latest version with all fixes included. (10.3 KB)