In the “Location” code field, when attempting to type “MP018”, the input defaults to “MP001” due to the autofill behavior of the combobox. For instance, after typing “MP01”, it automatically selects “MP001” instead of allowing the intended input “MP018”.
You may try to disable the auto complete feature:
https://docs.dhtmlx.com/api__dhtmlxcombo_disableautocomplete.html