Lookup Select Box saving text value rather than sys_id from a record producer

[rathbone]

When changing a record producer field that is a reference to a Lookup Select Box the html it generates sets the options value attribute to the String value not the sys_id.   When the request is saved to my table the reference is then broken.   I can't seem to find anywhere I can tell the field to populate the sys_id instead of string value.   How do I set the Lookup Select Box to have the sys_id in the value instead of the string value?   I am running Eureka but have tried in Fuji on my personal instance with the same result.   If I leave it as just a reference field it works as expected.

[poyntzj]

Got the same problem here.  

and once filled in I get this.  interestingly, the display Value is blank

1. {
2. "name": "tenant_auto_update_state",
3. "label": "Auto Update State",
4. "value": "Disabled",
5. "display_value": "",
6. "item_order": "15",
7. "type": "18",
8. "type_name": "Lookup Select Box",
9. "var_order": "1600",
10. "variable_set": "8537093fdbe2d8506a71af4bd3961956",
11. "variable_set_name": "CE - tenant",
12. "cat_item": "",
13. "cat_item_name": "",
14. "workflow": "",
15. "workflow_name": "",
16. "lookup_reference": "u_lookup_table",
17. "ref_qual": "u_active=true^u_key=ce^u_lookup_id=auto_update_state^ORDERBYu_order",
18. "ref_qual_cond": "^ORDERBYapplication",
19. "mandatory": "false"
20. },

tried a few variations and value is always what the label says